19909251

素因数分解:

$3^2\times {\mathrm{67}}^1\times {\mathrm{137}}^1\times {\mathrm{241}}^1$

素因数の和:451

約数の個数: 24

約数和(自身を含む): 29522064

約数和(自身を除く): 9612813

約数列:

[1, 3, 9, 67, 137, 201, 241, 411, 603, 723, 1233, 2169, 9179, 16147, 27537, 33017, 48441, 82611, 99051, 145323, 297153, 2212139, 6636417, 19909251]

約数ペア:

[(1, 19909251), (3, 6636417), (9, 2212139), (67, 297153), (137, 145323), (201, 99051), (241, 82611), (411, 48441), (603, 33017), (723, 27537), (1233, 16147), (2169, 9179)]