21210760

素因数分解:

$2^3\times 5^1\times {\mathrm{449}}^1\times {\mathrm{1181}}^1$

素因数の和:1641

約数の個数: 32

約数和(自身を含む): 47871000

約数和(自身を除く): 26660240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 449, 898, 1181, 1796, 2245, 2362, 3592, 4490, 4724, 5905, 8980, 9448, 11810, 17960, 23620, 47240, 530269, 1060538, 2121076, 2651345, 4242152, 5302690, 10605380, 21210760]

約数ペア:

[(1, 21210760), (2, 10605380), (4, 5302690), (5, 4242152), (8, 2651345), (10, 2121076), (20, 1060538), (40, 530269), (449, 47240), (898, 23620), (1181, 17960), (1796, 11810), (2245, 9448), (2362, 8980), (3592, 5905), (4490, 4724)]