21170025

素因数分解:

$3^3\times 5^2\times {\mathrm{79}}^1\times {\mathrm{397}}^1$

素因数の和:495

約数の個数: 48

約数和(自身を含む): 39481600

約数和(自身を除く): 18311575

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 79, 135, 225, 237, 395, 397, 675, 711, 1185, 1191, 1975, 1985, 2133, 3555, 3573, 5925, 5955, 9925, 10665, 10719, 17775, 17865, 29775, 31363, 53325, 53595, 89325, 94089, 156815, 267975, 282267, 470445, 784075, 846801, 1411335, 2352225, 4234005, 7056675, 21170025]

約数ペア:

[(1, 21170025), (3, 7056675), (5, 4234005), (9, 2352225), (15, 1411335), (25, 846801), (27, 784075), (45, 470445), (75, 282267), (79, 267975), (135, 156815), (225, 94089), (237, 89325), (395, 53595), (397, 53325), (675, 31363), (711, 29775), (1185, 17865), (1191, 17775), (1975, 10719), (1985, 10665), (2133, 9925), (3555, 5955), (3573, 5925)]