81322880

素因数分解:

$2^7\times 5^1\times {\mathrm{283}}^1\times {\mathrm{449}}^1$

素因数の和:751

約数の個数: 64

約数和(自身を含む): 195534000

約数和(自身を除く): 114211120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 283, 320, 449, 566, 640, 898, 1132, 1415, 1796, 2245, 2264, 2830, 3592, 4490, 4528, 5660, 7184, 8980, 9056, 11320, 14368, 17960, 18112, 22640, 28736, 35920, 36224, 45280, 57472, 71840, 90560, 127067, 143680, 181120, 254134, 287360, 508268, 635335, 1016536, 1270670, 2033072, 2541340, 4066144, 5082680, 8132288, 10165360, 16264576, 20330720, 40661440, 81322880]

約数ペア:

[(1, 81322880), (2, 40661440), (4, 20330720), (5, 16264576), (8, 10165360), (10, 8132288), (16, 5082680), (20, 4066144), (32, 2541340), (40, 2033072), (64, 1270670), (80, 1016536), (128, 635335), (160, 508268), (283, 287360), (320, 254134), (449, 181120), (566, 143680), (640, 127067), (898, 90560), (1132, 71840), (1415, 57472), (1796, 45280), (2245, 36224), (2264, 35920), (2830, 28736), (3592, 22640), (4490, 18112), (4528, 17960), (5660, 14368), (7184, 11320), (8980, 9056)]