19865625

素因数分解:

$3^1\times 5^5\times {\mathrm{13}}^1\times {\mathrm{163}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 35872704

約数和(自身を除く): 16007079

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 125, 163, 195, 325, 375, 489, 625, 815, 975, 1625, 1875, 2119, 2445, 3125, 4075, 4875, 6357, 8125, 9375, 10595, 12225, 20375, 24375, 31785, 40625, 52975, 61125, 101875, 121875, 158925, 264875, 305625, 509375, 794625, 1324375, 1528125, 3973125, 6621875, 19865625]

約数ペア:

[(1, 19865625), (3, 6621875), (5, 3973125), (13, 1528125), (15, 1324375), (25, 794625), (39, 509375), (65, 305625), (75, 264875), (125, 158925), (163, 121875), (195, 101875), (325, 61125), (375, 52975), (489, 40625), (625, 31785), (815, 24375), (975, 20375), (1625, 12225), (1875, 10595), (2119, 9375), (2445, 8125), (3125, 6357), (4075, 4875)]