21597620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{773}}^1$

素因数の和:920

約数の個数: 48

約数和(自身を含む): 49932288

約数和(自身を除く): 28334668

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 127, 220, 254, 508, 635, 773, 1270, 1397, 1546, 2540, 2794, 3092, 3865, 5588, 6985, 7730, 8503, 13970, 15460, 17006, 27940, 34012, 42515, 85030, 98171, 170060, 196342, 392684, 490855, 981710, 1079881, 1963420, 2159762, 4319524, 5399405, 10798810, 21597620]

約数ペア:

[(1, 21597620), (2, 10798810), (4, 5399405), (5, 4319524), (10, 2159762), (11, 1963420), (20, 1079881), (22, 981710), (44, 490855), (55, 392684), (110, 196342), (127, 170060), (220, 98171), (254, 85030), (508, 42515), (635, 34012), (773, 27940), (1270, 17006), (1397, 15460), (1546, 13970), (2540, 8503), (2794, 7730), (3092, 6985), (3865, 5588)]