18874401

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1471}}^1$

素因数の和:1541

約数の個数: 32

約数和(自身を含む): 31653888

約数和(自身を除く): 12779487

約数列:

[1, 3, 7, 13, 21, 39, 47, 91, 141, 273, 329, 611, 987, 1471, 1833, 4277, 4413, 10297, 12831, 19123, 30891, 57369, 69137, 133861, 207411, 401583, 483959, 898781, 1451877, 2696343, 6291467, 18874401]

約数ペア:

[(1, 18874401), (3, 6291467), (7, 2696343), (13, 1451877), (21, 898781), (39, 483959), (47, 401583), (91, 207411), (141, 133861), (273, 69137), (329, 57369), (611, 30891), (987, 19123), (1471, 12831), (1833, 10297), (4277, 4413)]