20399175

素因数分解:

$3^3\times 5^2\times {\mathrm{47}}^1\times {\mathrm{643}}^1$

素因数の和:709

約数の個数: 48

約数和(自身を含む): 38330880

約数和(自身を除く): 17931705

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 47, 75, 135, 141, 225, 235, 423, 643, 675, 705, 1175, 1269, 1929, 2115, 3215, 3525, 5787, 6345, 9645, 10575, 16075, 17361, 28935, 30221, 31725, 48225, 86805, 90663, 144675, 151105, 271989, 434025, 453315, 755525, 815967, 1359945, 2266575, 4079835, 6799725, 20399175]

約数ペア:

[(1, 20399175), (3, 6799725), (5, 4079835), (9, 2266575), (15, 1359945), (25, 815967), (27, 755525), (45, 453315), (47, 434025), (75, 271989), (135, 151105), (141, 144675), (225, 90663), (235, 86805), (423, 48225), (643, 31725), (675, 30221), (705, 28935), (1175, 17361), (1269, 16075), (1929, 10575), (2115, 9645), (3215, 6345), (3525, 5787)]