20325825

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{6949}}^1$

素因数の和:6978

約数の個数: 36

約数和(自身を含む): 39211900

約数和(自身を除く): 18886075

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 65, 75, 117, 195, 225, 325, 585, 975, 2925, 6949, 20847, 34745, 62541, 90337, 104235, 173725, 271011, 312705, 451685, 521175, 813033, 1355055, 1563525, 2258425, 4065165, 6775275, 20325825]

約数ペア:

[(1, 20325825), (3, 6775275), (5, 4065165), (9, 2258425), (13, 1563525), (15, 1355055), (25, 813033), (39, 521175), (45, 451685), (65, 312705), (75, 271011), (117, 173725), (195, 104235), (225, 90337), (325, 62541), (585, 34745), (975, 20847), (2925, 6949)]