81388720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:203

約数の個数: 160

約数和(自身を含む): 231413760

約数和(自身を除く): 150025040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 71, 80, 89, 92, 112, 115, 140, 142, 161, 178, 184, 230, 280, 284, 322, 355, 356, 368, 445, 460, 497, 560, 568, 623, 644, 710, 712, 805, 890, 920, 994, 1136, 1246, 1288, 1420, 1424, 1610, 1633, 1780, 1840, 1988, 2047, 2485, 2492, 2576, 2840, 3115, 3220, 3266, 3560, 3976, 4094, 4970, 4984, 5680, 6230, 6319, 6440, 6532, 7120, 7952, 8165, 8188, 9940, 9968, 10235, 11431, 12460, 12638, 12880, 13064, 14329, 16330, 16376, 19880, 20470, 22862, 24920, 25276, 26128, 28658, 31595, 32660, 32752, 39760, 40940, 44233, 45724, 49840, 50552, 57155, 57316, 63190, 65320, 71645, 81880, 88466, 91448, 101104, 114310, 114632, 126380, 130640, 143290, 145337, 163760, 176932, 182896, 221165, 228620, 229264, 252760, 286580, 290674, 353864, 442330, 457240, 505520, 573160, 581348, 707728, 726685, 884660, 914480, 1017359, 1146320, 1162696, 1453370, 1769320, 2034718, 2325392, 2906740, 3538640, 4069436, 5086795, 5813480, 8138872, 10173590, 11626960, 16277744, 20347180, 40694360, 81388720]

約数ペア:

[(1, 81388720), (2, 40694360), (4, 20347180), (5, 16277744), (7, 11626960), (8, 10173590), (10, 8138872), (14, 5813480), (16, 5086795), (20, 4069436), (23, 3538640), (28, 2906740), (35, 2325392), (40, 2034718), (46, 1769320), (56, 1453370), (70, 1162696), (71, 1146320), (80, 1017359), (89, 914480), (92, 884660), (112, 726685), (115, 707728), (140, 581348), (142, 573160), (161, 505520), (178, 457240), (184, 442330), (230, 353864), (280, 290674), (284, 286580), (322, 252760), (355, 229264), (356, 228620), (368, 221165), (445, 182896), (460, 176932), (497, 163760), (560, 145337), (568, 143290), (623, 130640), (644, 126380), (710, 114632), (712, 114310), (805, 101104), (890, 91448), (920, 88466), (994, 81880), (1136, 71645), (1246, 65320), (1288, 63190), (1420, 57316), (1424, 57155), (1610, 50552), (1633, 49840), (1780, 45724), (1840, 44233), (1988, 40940), (2047, 39760), (2485, 32752), (2492, 32660), (2576, 31595), (2840, 28658), (3115, 26128), (3220, 25276), (3266, 24920), (3560, 22862), (3976, 20470), (4094, 19880), (4970, 16376), (4984, 16330), (5680, 14329), (6230, 13064), (6319, 12880), (6440, 12638), (6532, 12460), (7120, 11431), (7952, 10235), (8165, 9968), (8188, 9940)]