21705640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{49331}}^1$

素因数の和:49353

約数の個数: 32

約数和(自身を含む): 53278560

約数和(自身を除く): 31572920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 49331, 98662, 197324, 246655, 394648, 493310, 542641, 986620, 1085282, 1973240, 2170564, 2713205, 4341128, 5426410, 10852820, 21705640]

約数ペア:

[(1, 21705640), (2, 10852820), (4, 5426410), (5, 4341128), (8, 2713205), (10, 2170564), (11, 1973240), (20, 1085282), (22, 986620), (40, 542641), (44, 493310), (55, 394648), (88, 246655), (110, 197324), (220, 98662), (440, 49331)]