21713220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1699}}^1$

素因数の和:1785

約数の個数: 72

約数和(自身を含む): 66830400

約数和(自身を除く): 45117180

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 71, 90, 142, 180, 213, 284, 355, 426, 639, 710, 852, 1065, 1278, 1420, 1699, 2130, 2556, 3195, 3398, 4260, 5097, 6390, 6796, 8495, 10194, 12780, 15291, 16990, 20388, 25485, 30582, 33980, 50970, 61164, 76455, 101940, 120629, 152910, 241258, 305820, 361887, 482516, 603145, 723774, 1085661, 1206290, 1447548, 1809435, 2171322, 2412580, 3618870, 4342644, 5428305, 7237740, 10856610, 21713220]

約数ペア:

[(1, 21713220), (2, 10856610), (3, 7237740), (4, 5428305), (5, 4342644), (6, 3618870), (9, 2412580), (10, 2171322), (12, 1809435), (15, 1447548), (18, 1206290), (20, 1085661), (30, 723774), (36, 603145), (45, 482516), (60, 361887), (71, 305820), (90, 241258), (142, 152910), (180, 120629), (213, 101940), (284, 76455), (355, 61164), (426, 50970), (639, 33980), (710, 30582), (852, 25485), (1065, 20388), (1278, 16990), (1420, 15291), (1699, 12780), (2130, 10194), (2556, 8495), (3195, 6796), (3398, 6390), (4260, 5097)]