21855075

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{449}}^1$

素因数の和:532

約数の個数: 48

約数和(自身を含む): 40176000

約数和(自身を除く): 18320925

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 59, 75, 165, 177, 275, 295, 449, 649, 825, 885, 1347, 1475, 1947, 2245, 3245, 4425, 4939, 6735, 9735, 11225, 14817, 16225, 24695, 26491, 33675, 48675, 74085, 79473, 123475, 132455, 291401, 370425, 397365, 662275, 874203, 1457005, 1986825, 4371015, 7285025, 21855075]

約数ペア:

[(1, 21855075), (3, 7285025), (5, 4371015), (11, 1986825), (15, 1457005), (25, 874203), (33, 662275), (55, 397365), (59, 370425), (75, 291401), (165, 132455), (177, 123475), (275, 79473), (295, 74085), (449, 48675), (649, 33675), (825, 26491), (885, 24695), (1347, 16225), (1475, 14817), (1947, 11225), (2245, 9735), (3245, 6735), (4425, 4939)]