21210800

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{4079}}^1$

素因数の和:4110

約数の個数: 60

約数和(自身を含む): 54892320

約数和(自身を除く): 33681520

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 130, 200, 208, 260, 325, 400, 520, 650, 1040, 1300, 2600, 4079, 5200, 8158, 16316, 20395, 32632, 40790, 53027, 65264, 81580, 101975, 106054, 163160, 203950, 212108, 265135, 326320, 407900, 424216, 530270, 815800, 848432, 1060540, 1325675, 1631600, 2121080, 2651350, 4242160, 5302700, 10605400, 21210800]

約数ペア:

[(1, 21210800), (2, 10605400), (4, 5302700), (5, 4242160), (8, 2651350), (10, 2121080), (13, 1631600), (16, 1325675), (20, 1060540), (25, 848432), (26, 815800), (40, 530270), (50, 424216), (52, 407900), (65, 326320), (80, 265135), (100, 212108), (104, 203950), (130, 163160), (200, 106054), (208, 101975), (260, 81580), (325, 65264), (400, 53027), (520, 40790), (650, 32632), (1040, 20395), (1300, 16316), (2600, 8158), (4079, 5200)]