21049570

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{123821}}^1$

素因数の和:123845

約数の個数: 16

約数和(自身を含む): 40118328

約数和(自身を除く): 19068758

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 123821, 247642, 619105, 1238210, 2104957, 4209914, 10524785, 21049570]

約数ペア:

[(1, 21049570), (2, 10524785), (5, 4209914), (10, 2104957), (17, 1238210), (34, 619105), (85, 247642), (170, 123821)]