21000657643

素因数分解:

$7^1\times {\mathrm{127}}^1\times {\mathrm{457}}^1\times {\mathrm{51691}}^1$

素因数の和:52282

約数の個数: 16

約数和(自身を含む): 24243134464

約数和(自身を除く): 3242476821

約数列:

[1, 7, 127, 457, 889, 3199, 51691, 58039, 361837, 406273, 6564757, 23622787, 45953299, 165359509, 3000093949, 21000657643]

約数ペア:

[(1, 21000657643), (7, 3000093949), (127, 165359509), (457, 45953299), (889, 23622787), (3199, 6564757), (51691, 406273), (58039, 361837)]