28355625

素因数分解:

$3^2\times 5^4\times {\mathrm{71}}^2$

素因数の和:168

約数の個数: 45

約数和(自身を含む): 51912289

約数和(自身を除く): 23556664

約数列:

[1, 3, 5, 9, 15, 25, 45, 71, 75, 125, 213, 225, 355, 375, 625, 639, 1065, 1125, 1775, 1875, 3195, 5041, 5325, 5625, 8875, 15123, 15975, 25205, 26625, 44375, 45369, 75615, 79875, 126025, 133125, 226845, 378075, 399375, 630125, 1134225, 1890375, 3150625, 5671125, 9451875, 28355625]

約数ペア:

[(1, 28355625), (3, 9451875), (5, 5671125), (9, 3150625), (15, 1890375), (25, 1134225), (45, 630125), (71, 399375), (75, 378075), (125, 226845), (213, 133125), (225, 126025), (355, 79875), (375, 75615), (625, 45369), (639, 44375), (1065, 26625), (1125, 25205), (1775, 15975), (1875, 15123), (3195, 8875), (5041, 5625)]