21086510

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{251}}^1\times {\mathrm{271}}^1$

素因数の和:560

約数の個数: 32

約数和(自身を含む): 39481344

約数和(自身を除く): 18394834

約数列:

[1, 2, 5, 10, 31, 62, 155, 251, 271, 310, 502, 542, 1255, 1355, 2510, 2710, 7781, 8401, 15562, 16802, 38905, 42005, 68021, 77810, 84010, 136042, 340105, 680210, 2108651, 4217302, 10543255, 21086510]

約数ペア:

[(1, 21086510), (2, 10543255), (5, 4217302), (10, 2108651), (31, 680210), (62, 340105), (155, 136042), (251, 84010), (271, 77810), (310, 68021), (502, 42005), (542, 38905), (1255, 16802), (1355, 15562), (2510, 8401), (2710, 7781)]