21551340

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{5059}}^1$

素因数の和:5142

約数の個数: 48

約数和(自身を含む): 61205760

約数和(自身を除く): 39654420

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 71, 142, 213, 284, 355, 426, 710, 852, 1065, 1420, 2130, 4260, 5059, 10118, 15177, 20236, 25295, 30354, 50590, 60708, 75885, 101180, 151770, 303540, 359189, 718378, 1077567, 1436756, 1795945, 2155134, 3591890, 4310268, 5387835, 7183780, 10775670, 21551340]

約数ペア:

[(1, 21551340), (2, 10775670), (3, 7183780), (4, 5387835), (5, 4310268), (6, 3591890), (10, 2155134), (12, 1795945), (15, 1436756), (20, 1077567), (30, 718378), (60, 359189), (71, 303540), (142, 151770), (213, 101180), (284, 75885), (355, 60708), (426, 50590), (710, 30354), (852, 25295), (1065, 20236), (1420, 15177), (2130, 10118), (4260, 5059)]