21155625

素因数分解:

$3^2\times 5^4\times {\mathrm{3761}}^1$

素因数の和:3787

約数の個数: 30

約数和(自身を含む): 38195586

約数和(自身を除く): 17039961

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 125, 225, 375, 625, 1125, 1875, 3761, 5625, 11283, 18805, 33849, 56415, 94025, 169245, 282075, 470125, 846225, 1410375, 2350625, 4231125, 7051875, 21155625]

約数ペア:

[(1, 21155625), (3, 7051875), (5, 4231125), (9, 2350625), (15, 1410375), (25, 846225), (45, 470125), (75, 282075), (125, 169245), (225, 94025), (375, 56415), (625, 33849), (1125, 18805), (1875, 11283), (3761, 5625)]