21840020

素因数分解:

$2^2\times 5^1\times {\mathrm{677}}^1\times {\mathrm{1613}}^1$

素因数の和:2299

約数の個数: 24

約数和(自身を含む): 45960264

約数和(自身を除く): 24120244

約数列:

[1, 2, 4, 5, 10, 20, 677, 1354, 1613, 2708, 3226, 3385, 6452, 6770, 8065, 13540, 16130, 32260, 1092001, 2184002, 4368004, 5460005, 10920010, 21840020]

約数ペア:

[(1, 21840020), (2, 10920010), (4, 5460005), (5, 4368004), (10, 2184002), (20, 1092001), (677, 32260), (1354, 16130), (1613, 13540), (2708, 8065), (3226, 6770), (3385, 6452)]