20689617

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1$

素因数の和:313

約数の個数: 32

約数和(自身を含む): 31144960

約数和(自身を除く): 10455343

約数列:

[1, 3, 13, 31, 39, 93, 109, 157, 327, 403, 471, 1209, 1417, 2041, 3379, 4251, 4867, 6123, 10137, 14601, 17113, 43927, 51339, 63271, 131781, 189813, 222469, 530503, 667407, 1591509, 6896539, 20689617]

約数ペア:

[(1, 20689617), (3, 6896539), (13, 1591509), (31, 667407), (39, 530503), (93, 222469), (109, 189813), (157, 131781), (327, 63271), (403, 51339), (471, 43927), (1209, 17113), (1417, 14601), (2041, 10137), (3379, 6123), (4251, 4867)]