21244905

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{167}}^1\times {\mathrm{257}}^1$

素因数の和:446

約数の個数: 48

約数和(自身を含む): 40569984

約数和(自身を除く): 19325079

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 167, 257, 495, 501, 771, 835, 1285, 1503, 1837, 2313, 2505, 2827, 3855, 5511, 7515, 8481, 9185, 11565, 14135, 16533, 25443, 27555, 42405, 42919, 82665, 127215, 128757, 214595, 386271, 472109, 643785, 1416327, 1931355, 2360545, 4248981, 7081635, 21244905]

約数ペア:

[(1, 21244905), (3, 7081635), (5, 4248981), (9, 2360545), (11, 1931355), (15, 1416327), (33, 643785), (45, 472109), (55, 386271), (99, 214595), (165, 128757), (167, 127215), (257, 82665), (495, 42919), (501, 42405), (771, 27555), (835, 25443), (1285, 16533), (1503, 14135), (1837, 11565), (2313, 9185), (2505, 8481), (2827, 7515), (3855, 5511)]