21936980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{607}}^1$

素因数の和:768

約数の個数: 48

約数和(自身を含む): 50050560

約数和(自身を除く): 28113580

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 139, 260, 278, 556, 607, 695, 1214, 1390, 1807, 2428, 2780, 3035, 3614, 6070, 7228, 7891, 9035, 12140, 15782, 18070, 31564, 36140, 39455, 78910, 84373, 157820, 168746, 337492, 421865, 843730, 1096849, 1687460, 2193698, 4387396, 5484245, 10968490, 21936980]

約数ペア:

[(1, 21936980), (2, 10968490), (4, 5484245), (5, 4387396), (10, 2193698), (13, 1687460), (20, 1096849), (26, 843730), (52, 421865), (65, 337492), (130, 168746), (139, 157820), (260, 84373), (278, 78910), (556, 39455), (607, 36140), (695, 31564), (1214, 18070), (1390, 15782), (1807, 12140), (2428, 9035), (2780, 7891), (3035, 7228), (3614, 6070)]