20548125

素因数分解:

$3^2\times 5^4\times {\mathrm{13}}^1\times {\mathrm{281}}^1$

素因数の和:320

約数の個数: 60

約数和(自身を含む): 40084044

約数和(自身を除く): 19535919

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 65, 75, 117, 125, 195, 225, 281, 325, 375, 585, 625, 843, 975, 1125, 1405, 1625, 1875, 2529, 2925, 3653, 4215, 4875, 5625, 7025, 8125, 10959, 12645, 14625, 18265, 21075, 24375, 32877, 35125, 54795, 63225, 73125, 91325, 105375, 164385, 175625, 273975, 316125, 456625, 526875, 821925, 1369875, 1580625, 2283125, 4109625, 6849375, 20548125]

約数ペア:

[(1, 20548125), (3, 6849375), (5, 4109625), (9, 2283125), (13, 1580625), (15, 1369875), (25, 821925), (39, 526875), (45, 456625), (65, 316125), (75, 273975), (117, 175625), (125, 164385), (195, 105375), (225, 91325), (281, 73125), (325, 63225), (375, 54795), (585, 35125), (625, 32877), (843, 24375), (975, 21075), (1125, 18265), (1405, 14625), (1625, 12645), (1875, 10959), (2529, 8125), (2925, 7025), (3653, 5625), (4215, 4875)]