20315997

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{19}}^2\times {\mathrm{37}}^1$

素因数の和:107

約数の個数: 54

約数和(自身を含む): 34443162

約数和(自身を除く): 14127165

約数列:

[1, 3, 9, 13, 19, 37, 39, 57, 111, 117, 169, 171, 247, 333, 361, 481, 507, 703, 741, 1083, 1443, 1521, 2109, 2223, 3211, 3249, 4329, 4693, 6253, 6327, 9139, 9633, 13357, 14079, 18759, 27417, 28899, 40071, 42237, 56277, 61009, 82251, 118807, 120213, 173641, 183027, 356421, 520923, 549081, 1069263, 1562769, 2257333, 6771999, 20315997]

約数ペア:

[(1, 20315997), (3, 6771999), (9, 2257333), (13, 1562769), (19, 1069263), (37, 549081), (39, 520923), (57, 356421), (111, 183027), (117, 173641), (169, 120213), (171, 118807), (247, 82251), (333, 61009), (361, 56277), (481, 42237), (507, 40071), (703, 28899), (741, 27417), (1083, 18759), (1443, 14079), (1521, 13357), (2109, 9633), (2223, 9139), (3211, 6327), (3249, 6253), (4329, 4693)]