19881785

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{457}}^1$

素因数の和:593

約数の個数: 32

約数和(自身を含む): 30074112

約数和(自身を除く): 10192327

約数列:

[1, 5, 7, 11, 35, 55, 77, 113, 385, 457, 565, 791, 1243, 2285, 3199, 3955, 5027, 6215, 8701, 15995, 25135, 35189, 43505, 51641, 175945, 258205, 361487, 568051, 1807435, 2840255, 3976357, 19881785]

約数ペア:

[(1, 19881785), (5, 3976357), (7, 2840255), (11, 1807435), (35, 568051), (55, 361487), (77, 258205), (113, 175945), (385, 51641), (457, 43505), (565, 35189), (791, 25135), (1243, 15995), (2285, 8701), (3199, 6215), (3955, 5027)]