18689775

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{661}}^1$

素因数の和:716

約数の個数: 48

約数和(自身を含む): 34476960

約数和(自身を除く): 15787185

約数列:

[1, 3, 5, 13, 15, 25, 29, 39, 65, 75, 87, 145, 195, 325, 377, 435, 661, 725, 975, 1131, 1885, 1983, 2175, 3305, 5655, 8593, 9425, 9915, 16525, 19169, 25779, 28275, 42965, 49575, 57507, 95845, 128895, 214825, 249197, 287535, 479225, 644475, 747591, 1245985, 1437675, 3737955, 6229925, 18689775]

約数ペア:

[(1, 18689775), (3, 6229925), (5, 3737955), (13, 1437675), (15, 1245985), (25, 747591), (29, 644475), (39, 479225), (65, 287535), (75, 249197), (87, 214825), (145, 128895), (195, 95845), (325, 57507), (377, 49575), (435, 42965), (661, 28275), (725, 25779), (975, 19169), (1131, 16525), (1885, 9915), (1983, 9425), (2175, 8593), (3305, 5655)]