40448720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1$

素因数の和:157

約数の個数: 160

約数和(自身を含む): 112492800

約数和(自身を除く): 72044080

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 23, 26, 38, 40, 46, 52, 65, 76, 80, 89, 92, 95, 104, 115, 130, 152, 178, 184, 190, 208, 230, 247, 260, 299, 304, 356, 368, 380, 437, 445, 460, 494, 520, 598, 712, 760, 874, 890, 920, 988, 1040, 1157, 1196, 1235, 1424, 1495, 1520, 1691, 1748, 1780, 1840, 1976, 2047, 2185, 2314, 2392, 2470, 2990, 3382, 3496, 3560, 3952, 4094, 4370, 4628, 4784, 4940, 5681, 5785, 5980, 6764, 6992, 7120, 8188, 8455, 8740, 9256, 9880, 10235, 11362, 11570, 11960, 13528, 16376, 16910, 17480, 18512, 19760, 20470, 21983, 22724, 23140, 23920, 26611, 27056, 28405, 32752, 33820, 34960, 38893, 40940, 43966, 45448, 46280, 53222, 56810, 67640, 77786, 81880, 87932, 90896, 92560, 106444, 109915, 113620, 133055, 135280, 155572, 163760, 175864, 194465, 212888, 219830, 227240, 266110, 311144, 351728, 388930, 425776, 439660, 454480, 505609, 532220, 622288, 777860, 879320, 1011218, 1064440, 1555720, 1758640, 2022436, 2128880, 2528045, 3111440, 4044872, 5056090, 8089744, 10112180, 20224360, 40448720]

約数ペア:

[(1, 40448720), (2, 20224360), (4, 10112180), (5, 8089744), (8, 5056090), (10, 4044872), (13, 3111440), (16, 2528045), (19, 2128880), (20, 2022436), (23, 1758640), (26, 1555720), (38, 1064440), (40, 1011218), (46, 879320), (52, 777860), (65, 622288), (76, 532220), (80, 505609), (89, 454480), (92, 439660), (95, 425776), (104, 388930), (115, 351728), (130, 311144), (152, 266110), (178, 227240), (184, 219830), (190, 212888), (208, 194465), (230, 175864), (247, 163760), (260, 155572), (299, 135280), (304, 133055), (356, 113620), (368, 109915), (380, 106444), (437, 92560), (445, 90896), (460, 87932), (494, 81880), (520, 77786), (598, 67640), (712, 56810), (760, 53222), (874, 46280), (890, 45448), (920, 43966), (988, 40940), (1040, 38893), (1157, 34960), (1196, 33820), (1235, 32752), (1424, 28405), (1495, 27056), (1520, 26611), (1691, 23920), (1748, 23140), (1780, 22724), (1840, 21983), (1976, 20470), (2047, 19760), (2185, 18512), (2314, 17480), (2392, 16910), (2470, 16376), (2990, 13528), (3382, 11960), (3496, 11570), (3560, 11362), (3952, 10235), (4094, 9880), (4370, 9256), (4628, 8740), (4784, 8455), (4940, 8188), (5681, 7120), (5785, 6992), (5980, 6764)]