21089020

素因数分解:

$2^2\times 5^1\times {\mathrm{251}}^1\times {\mathrm{4201}}^1$

素因数の和:4461

約数の個数: 24

約数和(自身を含む): 44473968

約数和(自身を除く): 23384948

約数列:

[1, 2, 4, 5, 10, 20, 251, 502, 1004, 1255, 2510, 4201, 5020, 8402, 16804, 21005, 42010, 84020, 1054451, 2108902, 4217804, 5272255, 10544510, 21089020]

約数ペア:

[(1, 21089020), (2, 10544510), (4, 5272255), (5, 4217804), (10, 2108902), (20, 1054451), (251, 84020), (502, 42010), (1004, 21005), (1255, 16804), (2510, 8402), (4201, 5020)]