21709701

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{389}}^1$

素因数の和:467

約数の個数: 40

約数和(自身を含む): 35675640

約数和(自身を除く): 13965939

約数列:

[1, 3, 9, 13, 27, 39, 53, 81, 117, 159, 351, 389, 477, 689, 1053, 1167, 1431, 2067, 3501, 4293, 5057, 6201, 10503, 15171, 18603, 20617, 31509, 45513, 55809, 61851, 136539, 185553, 268021, 409617, 556659, 804063, 1669977, 2412189, 7236567, 21709701]

約数ペア:

[(1, 21709701), (3, 7236567), (9, 2412189), (13, 1669977), (27, 804063), (39, 556659), (53, 409617), (81, 268021), (117, 185553), (159, 136539), (351, 61851), (389, 55809), (477, 45513), (689, 31509), (1053, 20617), (1167, 18603), (1431, 15171), (2067, 10503), (3501, 6201), (4293, 5057)]