21004160

素因数分解:

$2^7\times 5^1\times {\mathrm{37}}^1\times {\mathrm{887}}^1$

素因数の和:943

約数の個数: 64

約数和(自身を含む): 51628320

約数和(自身を除く): 30624160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 64, 74, 80, 128, 148, 160, 185, 296, 320, 370, 592, 640, 740, 887, 1184, 1480, 1774, 2368, 2960, 3548, 4435, 4736, 5920, 7096, 8870, 11840, 14192, 17740, 23680, 28384, 32819, 35480, 56768, 65638, 70960, 113536, 131276, 141920, 164095, 262552, 283840, 328190, 525104, 567680, 656380, 1050208, 1312760, 2100416, 2625520, 4200832, 5251040, 10502080, 21004160]

約数ペア:

[(1, 21004160), (2, 10502080), (4, 5251040), (5, 4200832), (8, 2625520), (10, 2100416), (16, 1312760), (20, 1050208), (32, 656380), (37, 567680), (40, 525104), (64, 328190), (74, 283840), (80, 262552), (128, 164095), (148, 141920), (160, 131276), (185, 113536), (296, 70960), (320, 65638), (370, 56768), (592, 35480), (640, 32819), (740, 28384), (887, 23680), (1184, 17740), (1480, 14192), (1774, 11840), (2368, 8870), (2960, 7096), (3548, 5920), (4435, 4736)]