21684975

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{967}}^1$

素因数の和:1016

約数の個数: 48

約数和(自身を含む): 40330752

約数和(自身を除く): 18645777

約数列:

[1, 3, 5, 13, 15, 23, 25, 39, 65, 69, 75, 115, 195, 299, 325, 345, 575, 897, 967, 975, 1495, 1725, 2901, 4485, 4835, 7475, 12571, 14505, 22241, 22425, 24175, 37713, 62855, 66723, 72525, 111205, 188565, 289133, 314275, 333615, 556025, 867399, 942825, 1445665, 1668075, 4336995, 7228325, 21684975]

約数ペア:

[(1, 21684975), (3, 7228325), (5, 4336995), (13, 1668075), (15, 1445665), (23, 942825), (25, 867399), (39, 556025), (65, 333615), (69, 314275), (75, 289133), (115, 188565), (195, 111205), (299, 72525), (325, 66723), (345, 62855), (575, 37713), (897, 24175), (967, 22425), (975, 22241), (1495, 14505), (1725, 12571), (2901, 7475), (4485, 4835)]