81610240

素因数分解:

$2^9\times 5^1\times {\mathrm{71}}^1\times {\mathrm{449}}^1$

素因数の和:543

約数の個数: 80

約数和(自身を含む): 198871200

約数和(自身を除く): 117260960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 71, 80, 128, 142, 160, 256, 284, 320, 355, 449, 512, 568, 640, 710, 898, 1136, 1280, 1420, 1796, 2245, 2272, 2560, 2840, 3592, 4490, 4544, 5680, 7184, 8980, 9088, 11360, 14368, 17960, 18176, 22720, 28736, 31879, 35920, 36352, 45440, 57472, 63758, 71840, 90880, 114944, 127516, 143680, 159395, 181760, 229888, 255032, 287360, 318790, 510064, 574720, 637580, 1020128, 1149440, 1275160, 2040256, 2550320, 4080512, 5100640, 8161024, 10201280, 16322048, 20402560, 40805120, 81610240]

約数ペア:

[(1, 81610240), (2, 40805120), (4, 20402560), (5, 16322048), (8, 10201280), (10, 8161024), (16, 5100640), (20, 4080512), (32, 2550320), (40, 2040256), (64, 1275160), (71, 1149440), (80, 1020128), (128, 637580), (142, 574720), (160, 510064), (256, 318790), (284, 287360), (320, 255032), (355, 229888), (449, 181760), (512, 159395), (568, 143680), (640, 127516), (710, 114944), (898, 90880), (1136, 71840), (1280, 63758), (1420, 57472), (1796, 45440), (2245, 36352), (2272, 35920), (2560, 31879), (2840, 28736), (3592, 22720), (4490, 18176), (4544, 17960), (5680, 14368), (7184, 11360), (8980, 9088)]