21788505

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{15619}}^1$

素因数の和:15661

約数の個数: 24

約数和(自身を含む): 38987520

約数和(自身を除く): 17199015

約数列:

[1, 3, 5, 9, 15, 31, 45, 93, 155, 279, 465, 1395, 15619, 46857, 78095, 140571, 234285, 484189, 702855, 1452567, 2420945, 4357701, 7262835, 21788505]

約数ペア:

[(1, 21788505), (3, 7262835), (5, 4357701), (9, 2420945), (15, 1452567), (31, 702855), (45, 484189), (93, 234285), (155, 140571), (279, 78095), (465, 46857), (1395, 15619)]