20973849

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1\times {\mathrm{139}}^1$

素因数の和:281

約数の個数: 32

約数和(自身を含む): 31328640

約数和(自身を除く): 10354791

約数列:

[1, 3, 13, 39, 53, 73, 139, 159, 219, 417, 689, 949, 1807, 2067, 2847, 3869, 5421, 7367, 10147, 11607, 22101, 30441, 50297, 95771, 131911, 150891, 287313, 395733, 537791, 1613373, 6991283, 20973849]

約数ペア:

[(1, 20973849), (3, 6991283), (13, 1613373), (39, 537791), (53, 395733), (73, 287313), (139, 150891), (159, 131911), (219, 95771), (417, 50297), (689, 30441), (949, 22101), (1807, 11607), (2067, 10147), (2847, 7367), (3869, 5421)]