21165885

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{373}}^1$

素因数の和:494

約数の個数: 48

約数和(自身を含む): 40023984

約数和(自身を除く): 18858099

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 97, 117, 195, 291, 373, 485, 585, 873, 1119, 1261, 1455, 1865, 3357, 3783, 4365, 4849, 5595, 6305, 11349, 14547, 16785, 18915, 24245, 36181, 43641, 56745, 72735, 108543, 180905, 218205, 325629, 470353, 542715, 1411059, 1628145, 2351765, 4233177, 7055295, 21165885]

約数ペア:

[(1, 21165885), (3, 7055295), (5, 4233177), (9, 2351765), (13, 1628145), (15, 1411059), (39, 542715), (45, 470353), (65, 325629), (97, 218205), (117, 180905), (195, 108543), (291, 72735), (373, 56745), (485, 43641), (585, 36181), (873, 24245), (1119, 18915), (1261, 16785), (1455, 14547), (1865, 11349), (3357, 6305), (3783, 5595), (4365, 4849)]