20280100

素因数分解:

$2^2\times 5^2\times {\mathrm{139}}^1\times {\mathrm{1459}}^1$

素因数の和:1612

約数の個数: 36

約数和(自身を含む): 44354800

約数和(自身を除く): 24074700

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 139, 278, 556, 695, 1390, 1459, 2780, 2918, 3475, 5836, 6950, 7295, 13900, 14590, 29180, 36475, 72950, 145900, 202801, 405602, 811204, 1014005, 2028010, 4056020, 5070025, 10140050, 20280100]

約数ペア:

[(1, 20280100), (2, 10140050), (4, 5070025), (5, 4056020), (10, 2028010), (20, 1014005), (25, 811204), (50, 405602), (100, 202801), (139, 145900), (278, 72950), (556, 36475), (695, 29180), (1390, 14590), (1459, 13900), (2780, 7295), (2918, 6950), (3475, 5836)]