21294580

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25969}}^1$

素因数の和:26019

約数の個数: 24

約数和(自身を含む): 45811080

約数和(自身を除く): 24516500

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25969, 51938, 103876, 129845, 259690, 519380, 1064729, 2129458, 4258916, 5323645, 10647290, 21294580]

約数ペア:

[(1, 21294580), (2, 10647290), (4, 5323645), (5, 4258916), (10, 2129458), (20, 1064729), (41, 519380), (82, 259690), (164, 129845), (205, 103876), (410, 51938), (820, 25969)]