21352860

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{313}}^1\times {\mathrm{379}}^1$

素因数の和:707

約数の個数: 72

約数和(自身を含む): 65148720

約数和(自身を除く): 43795860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 313, 379, 626, 758, 939, 1137, 1252, 1516, 1565, 1878, 1895, 2274, 2817, 3130, 3411, 3756, 3790, 4548, 4695, 5634, 5685, 6260, 6822, 7580, 9390, 11268, 11370, 13644, 14085, 17055, 18780, 22740, 28170, 34110, 56340, 68220, 118627, 237254, 355881, 474508, 593135, 711762, 1067643, 1186270, 1423524, 1779405, 2135286, 2372540, 3558810, 4270572, 5338215, 7117620, 10676430, 21352860]

約数ペア:

[(1, 21352860), (2, 10676430), (3, 7117620), (4, 5338215), (5, 4270572), (6, 3558810), (9, 2372540), (10, 2135286), (12, 1779405), (15, 1423524), (18, 1186270), (20, 1067643), (30, 711762), (36, 593135), (45, 474508), (60, 355881), (90, 237254), (180, 118627), (313, 68220), (379, 56340), (626, 34110), (758, 28170), (939, 22740), (1137, 18780), (1252, 17055), (1516, 14085), (1565, 13644), (1878, 11370), (1895, 11268), (2274, 9390), (2817, 7580), (3130, 6822), (3411, 6260), (3756, 5685), (3790, 5634), (4548, 4695)]