20187700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{293}}^1$

素因数の和:373

約数の個数: 72

約数和(自身を含む): 48231288

約数和(自身を除く): 28043588

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 53, 65, 100, 106, 130, 212, 260, 265, 293, 325, 530, 586, 650, 689, 1060, 1172, 1300, 1325, 1378, 1465, 2650, 2756, 2930, 3445, 3809, 5300, 5860, 6890, 7325, 7618, 13780, 14650, 15236, 15529, 17225, 19045, 29300, 31058, 34450, 38090, 62116, 68900, 76180, 77645, 95225, 155290, 190450, 201877, 310580, 380900, 388225, 403754, 776450, 807508, 1009385, 1552900, 2018770, 4037540, 5046925, 10093850, 20187700]

約数ペア:

[(1, 20187700), (2, 10093850), (4, 5046925), (5, 4037540), (10, 2018770), (13, 1552900), (20, 1009385), (25, 807508), (26, 776450), (50, 403754), (52, 388225), (53, 380900), (65, 310580), (100, 201877), (106, 190450), (130, 155290), (212, 95225), (260, 77645), (265, 76180), (293, 68900), (325, 62116), (530, 38090), (586, 34450), (650, 31058), (689, 29300), (1060, 19045), (1172, 17225), (1300, 15529), (1325, 15236), (1378, 14650), (1465, 13780), (2650, 7618), (2756, 7325), (2930, 6890), (3445, 5860), (3809, 5300)]