21353805

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{179}}^1\times {\mathrm{241}}^1$

素因数の和:442

約数の個数: 48

約数和(自身を含む): 40772160

約数和(自身を除く): 19418355

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 179, 241, 495, 537, 723, 895, 1205, 1611, 1969, 2169, 2651, 2685, 3615, 5907, 7953, 8055, 9845, 10845, 13255, 17721, 23859, 29535, 39765, 43139, 88605, 119295, 129417, 215695, 388251, 474529, 647085, 1423587, 1941255, 2372645, 4270761, 7117935, 21353805]

約数ペア:

[(1, 21353805), (3, 7117935), (5, 4270761), (9, 2372645), (11, 1941255), (15, 1423587), (33, 647085), (45, 474529), (55, 388251), (99, 215695), (165, 129417), (179, 119295), (241, 88605), (495, 43139), (537, 39765), (723, 29535), (895, 23859), (1205, 17721), (1611, 13255), (1969, 10845), (2169, 9845), (2651, 8055), (2685, 7953), (3615, 5907)]