128387840

素因数分解:

$2^8\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{89}}^1$

素因数の和:147

約数の個数: 216

約数和(自身を含む): 377485920

約数和(自身を除く): 249098080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 32, 35, 40, 46, 49, 56, 64, 70, 80, 89, 92, 98, 112, 115, 128, 140, 160, 161, 178, 184, 196, 224, 230, 245, 256, 280, 320, 322, 356, 368, 392, 445, 448, 460, 490, 560, 623, 640, 644, 712, 736, 784, 805, 890, 896, 920, 980, 1120, 1127, 1246, 1280, 1288, 1424, 1472, 1568, 1610, 1780, 1792, 1840, 1960, 2047, 2240, 2254, 2492, 2576, 2848, 2944, 3115, 3136, 3220, 3560, 3680, 3920, 4094, 4361, 4480, 4508, 4984, 5152, 5635, 5696, 5888, 6230, 6272, 6440, 7120, 7360, 7840, 8188, 8722, 8960, 9016, 9968, 10235, 10304, 11270, 11392, 12460, 12544, 12880, 14240, 14329, 14720, 15680, 16376, 17444, 18032, 19936, 20470, 20608, 21805, 22540, 22784, 24920, 25760, 28480, 28658, 29440, 31360, 32752, 34888, 36064, 39872, 40940, 41216, 43610, 45080, 49840, 51520, 56960, 57316, 62720, 65504, 69776, 71645, 72128, 79744, 81880, 87220, 90160, 99680, 100303, 103040, 113920, 114632, 131008, 139552, 143290, 144256, 159488, 163760, 174440, 180320, 199360, 200606, 206080, 229264, 262016, 279104, 286580, 288512, 327520, 348880, 360640, 398720, 401212, 458528, 501515, 524032, 558208, 573160, 655040, 697760, 721280, 797440, 802424, 917056, 1003030, 1116416, 1146320, 1310080, 1395520, 1442560, 1604848, 1834112, 2006060, 2292640, 2620160, 2791040, 3209696, 3668224, 4012120, 4585280, 5582080, 6419392, 8024240, 9170560, 12838784, 16048480, 18341120, 25677568, 32096960, 64193920, 128387840]

約数ペア:

[(1, 128387840), (2, 64193920), (4, 32096960), (5, 25677568), (7, 18341120), (8, 16048480), (10, 12838784), (14, 9170560), (16, 8024240), (20, 6419392), (23, 5582080), (28, 4585280), (32, 4012120), (35, 3668224), (40, 3209696), (46, 2791040), (49, 2620160), (56, 2292640), (64, 2006060), (70, 1834112), (80, 1604848), (89, 1442560), (92, 1395520), (98, 1310080), (112, 1146320), (115, 1116416), (128, 1003030), (140, 917056), (160, 802424), (161, 797440), (178, 721280), (184, 697760), (196, 655040), (224, 573160), (230, 558208), (245, 524032), (256, 501515), (280, 458528), (320, 401212), (322, 398720), (356, 360640), (368, 348880), (392, 327520), (445, 288512), (448, 286580), (460, 279104), (490, 262016), (560, 229264), (623, 206080), (640, 200606), (644, 199360), (712, 180320), (736, 174440), (784, 163760), (805, 159488), (890, 144256), (896, 143290), (920, 139552), (980, 131008), (1120, 114632), (1127, 113920), (1246, 103040), (1280, 100303), (1288, 99680), (1424, 90160), (1472, 87220), (1568, 81880), (1610, 79744), (1780, 72128), (1792, 71645), (1840, 69776), (1960, 65504), (2047, 62720), (2240, 57316), (2254, 56960), (2492, 51520), (2576, 49840), (2848, 45080), (2944, 43610), (3115, 41216), (3136, 40940), (3220, 39872), (3560, 36064), (3680, 34888), (3920, 32752), (4094, 31360), (4361, 29440), (4480, 28658), (4508, 28480), (4984, 25760), (5152, 24920), (5635, 22784), (5696, 22540), (5888, 21805), (6230, 20608), (6272, 20470), (6440, 19936), (7120, 18032), (7360, 17444), (7840, 16376), (8188, 15680), (8722, 14720), (8960, 14329), (9016, 14240), (9968, 12880), (10235, 12544), (10304, 12460), (11270, 11392)]