20318175

素因数分解:

$3^3\times 5^2\times {\mathrm{31}}^1\times {\mathrm{971}}^1$

素因数の和:1021

約数の個数: 48

約数和(自身を含む): 38568960

約数和(自身を除く): 18250785

約数列:

[1, 3, 5, 9, 15, 25, 27, 31, 45, 75, 93, 135, 155, 225, 279, 465, 675, 775, 837, 971, 1395, 2325, 2913, 4185, 4855, 6975, 8739, 14565, 20925, 24275, 26217, 30101, 43695, 72825, 90303, 131085, 150505, 218475, 270909, 451515, 655425, 752525, 812727, 1354545, 2257575, 4063635, 6772725, 20318175]

約数ペア:

[(1, 20318175), (3, 6772725), (5, 4063635), (9, 2257575), (15, 1354545), (25, 812727), (27, 752525), (31, 655425), (45, 451515), (75, 270909), (93, 218475), (135, 150505), (155, 131085), (225, 90303), (279, 72825), (465, 43695), (675, 30101), (775, 26217), (837, 24275), (971, 20925), (1395, 14565), (2325, 8739), (2913, 6975), (4185, 4855)]