20970225

素因数分解:

$3^3\times 5^2\times {\mathrm{47}}^1\times {\mathrm{661}}^1$

素因数の和:727

約数の個数: 48

約数和(自身を含む): 39402240

約数和(自身を除く): 18432015

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 47, 75, 135, 141, 225, 235, 423, 661, 675, 705, 1175, 1269, 1983, 2115, 3305, 3525, 5949, 6345, 9915, 10575, 16525, 17847, 29745, 31067, 31725, 49575, 89235, 93201, 148725, 155335, 279603, 446175, 466005, 776675, 838809, 1398015, 2330025, 4194045, 6990075, 20970225]

約数ペア:

[(1, 20970225), (3, 6990075), (5, 4194045), (9, 2330025), (15, 1398015), (25, 838809), (27, 776675), (45, 466005), (47, 446175), (75, 279603), (135, 155335), (141, 148725), (225, 93201), (235, 89235), (423, 49575), (661, 31725), (675, 31067), (705, 29745), (1175, 17847), (1269, 16525), (1983, 10575), (2115, 9915), (3305, 6345), (3525, 5949)]