21920810

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{269}}^1\times {\mathrm{281}}^1$

素因数の和:586

約数の個数: 32

約数和(自身を含む): 41115600

約数和(自身を除く): 19194790

約数列:

[1, 2, 5, 10, 29, 58, 145, 269, 281, 290, 538, 562, 1345, 1405, 2690, 2810, 7801, 8149, 15602, 16298, 39005, 40745, 75589, 78010, 81490, 151178, 377945, 755890, 2192081, 4384162, 10960405, 21920810]

約数ペア:

[(1, 21920810), (2, 10960405), (5, 4384162), (10, 2192081), (29, 755890), (58, 377945), (145, 151178), (269, 81490), (281, 78010), (290, 75589), (538, 40745), (562, 39005), (1345, 16298), (1405, 15602), (2690, 8149), (2810, 7801)]