20455425

素因数分解:

$3^2\times 5^2\times {\mathrm{229}}^1\times {\mathrm{397}}^1$

素因数の和:642

約数の個数: 36

約数和(自身を含む): 36890620

約数和(自身を除く): 16435195

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 229, 397, 687, 1145, 1191, 1985, 2061, 3435, 3573, 5725, 5955, 9925, 10305, 17175, 17865, 29775, 51525, 89325, 90913, 272739, 454565, 818217, 1363695, 2272825, 4091085, 6818475, 20455425]

約数ペア:

[(1, 20455425), (3, 6818475), (5, 4091085), (9, 2272825), (15, 1363695), (25, 818217), (45, 454565), (75, 272739), (225, 90913), (229, 89325), (397, 51525), (687, 29775), (1145, 17865), (1191, 17175), (1985, 10305), (2061, 9925), (3435, 5955), (3573, 5725)]