21593980

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{1201}}^1$

素因数の和:1270

約数の個数: 48

約数和(自身を含む): 48464640

約数和(自身を除く): 26870660

約数列:

[1, 2, 4, 5, 10, 20, 29, 31, 58, 62, 116, 124, 145, 155, 290, 310, 580, 620, 899, 1201, 1798, 2402, 3596, 4495, 4804, 6005, 8990, 12010, 17980, 24020, 34829, 37231, 69658, 74462, 139316, 148924, 174145, 186155, 348290, 372310, 696580, 744620, 1079699, 2159398, 4318796, 5398495, 10796990, 21593980]

約数ペア:

[(1, 21593980), (2, 10796990), (4, 5398495), (5, 4318796), (10, 2159398), (20, 1079699), (29, 744620), (31, 696580), (58, 372310), (62, 348290), (116, 186155), (124, 174145), (145, 148924), (155, 139316), (290, 74462), (310, 69658), (580, 37231), (620, 34829), (899, 24020), (1201, 17980), (1798, 12010), (2402, 8990), (3596, 6005), (4495, 4804)]