21471921

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{113}}^1\times {\mathrm{491}}^1$

素因数の和:653

約数の個数: 24

約数和(自身を含む): 32082336

約数和(自身を除く): 10610415

約数列:

[1, 3, 9, 43, 113, 129, 339, 387, 491, 1017, 1473, 4419, 4859, 14577, 21113, 43731, 55483, 63339, 166449, 190017, 499347, 2385769, 7157307, 21471921]

約数ペア:

[(1, 21471921), (3, 7157307), (9, 2385769), (43, 499347), (113, 190017), (129, 166449), (339, 63339), (387, 55483), (491, 43731), (1017, 21113), (1473, 14577), (4419, 4859)]