20878875

素因数分解:

$3^2\times 5^3\times {\mathrm{67}}^1\times {\mathrm{277}}^1$

素因数の和:365

約数の個数: 48

約数和(自身を含む): 38337312

約数和(自身を除く): 17458437

約数列:

[1, 3, 5, 9, 15, 25, 45, 67, 75, 125, 201, 225, 277, 335, 375, 603, 831, 1005, 1125, 1385, 1675, 2493, 3015, 4155, 5025, 6925, 8375, 12465, 15075, 18559, 20775, 25125, 34625, 55677, 62325, 75375, 92795, 103875, 167031, 278385, 311625, 463975, 835155, 1391925, 2319875, 4175775, 6959625, 20878875]

約数ペア:

[(1, 20878875), (3, 6959625), (5, 4175775), (9, 2319875), (15, 1391925), (25, 835155), (45, 463975), (67, 311625), (75, 278385), (125, 167031), (201, 103875), (225, 92795), (277, 75375), (335, 62325), (375, 55677), (603, 34625), (831, 25125), (1005, 20775), (1125, 18559), (1385, 15075), (1675, 12465), (2493, 8375), (3015, 6925), (4155, 5025)]