20985415

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{223}}^1$

素因数の和:327

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 8044985

約数列:

[1, 5, 11, 29, 55, 59, 145, 223, 295, 319, 649, 1115, 1595, 1711, 2453, 3245, 6467, 8555, 12265, 13157, 18821, 32335, 65785, 71137, 94105, 144727, 355685, 381553, 723635, 1907765, 4197083, 20985415]

約数ペア:

[(1, 20985415), (5, 4197083), (11, 1907765), (29, 723635), (55, 381553), (59, 355685), (145, 144727), (223, 94105), (295, 71137), (319, 65785), (649, 32335), (1115, 18821), (1595, 13157), (1711, 12265), (2453, 8555), (3245, 6467)]