21686515

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{181}}^1\times {\mathrm{773}}^1$

素因数の和:990

約数の個数: 16

約数和(自身を含む): 27046656

約数和(自身を除く): 5360141

約数列:

[1, 5, 31, 155, 181, 773, 905, 3865, 5611, 23963, 28055, 119815, 139913, 699565, 4337303, 21686515]

約数ペア:

[(1, 21686515), (5, 4337303), (31, 699565), (155, 139913), (181, 119815), (773, 28055), (905, 23963), (3865, 5611)]