21304415

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1$

素因数の和:120

約数の個数: 48

約数和(自身を含む): 31272480

約数和(自身を除く): 9968065

約数列:

[1, 5, 11, 19, 29, 37, 55, 95, 145, 185, 209, 319, 361, 407, 551, 703, 1045, 1073, 1595, 1805, 2035, 2755, 3515, 3971, 5365, 6061, 7733, 10469, 11803, 13357, 19855, 20387, 30305, 38665, 52345, 59015, 66785, 101935, 115159, 146927, 224257, 387353, 575795, 734635, 1121285, 1936765, 4260883, 21304415]

約数ペア:

[(1, 21304415), (5, 4260883), (11, 1936765), (19, 1121285), (29, 734635), (37, 575795), (55, 387353), (95, 224257), (145, 146927), (185, 115159), (209, 101935), (319, 66785), (361, 59015), (407, 52345), (551, 38665), (703, 30305), (1045, 20387), (1073, 19855), (1595, 13357), (1805, 11803), (2035, 10469), (2755, 7733), (3515, 6061), (3971, 5365)]