19811025

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^2\times {\mathrm{521}}^1$

素因数の和:563

約数の個数: 54

約数和(自身を含む): 38496978

約数和(自身を除く): 18685953

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 65, 75, 117, 169, 195, 225, 325, 507, 521, 585, 845, 975, 1521, 1563, 2535, 2605, 2925, 4225, 4689, 6773, 7605, 7815, 12675, 13025, 20319, 23445, 33865, 38025, 39075, 60957, 88049, 101595, 117225, 169325, 264147, 304785, 440245, 507975, 792441, 1320735, 1523925, 2201225, 3962205, 6603675, 19811025]

約数ペア:

[(1, 19811025), (3, 6603675), (5, 3962205), (9, 2201225), (13, 1523925), (15, 1320735), (25, 792441), (39, 507975), (45, 440245), (65, 304785), (75, 264147), (117, 169325), (169, 117225), (195, 101595), (225, 88049), (325, 60957), (507, 39075), (521, 38025), (585, 33865), (845, 23445), (975, 20319), (1521, 13025), (1563, 12675), (2535, 7815), (2605, 7605), (2925, 6773), (4225, 4689)]