21351875

素因数分解:

$5^4\times {\mathrm{127}}^1\times {\mathrm{269}}^1$

素因数の和:416

約数の個数: 20

約数和(自身を含む): 26991360

約数和(自身を除く): 5639485

約数列:

[1, 5, 25, 125, 127, 269, 625, 635, 1345, 3175, 6725, 15875, 33625, 34163, 79375, 168125, 170815, 854075, 4270375, 21351875]

約数ペア:

[(1, 21351875), (5, 4270375), (25, 854075), (125, 170815), (127, 168125), (269, 79375), (625, 34163), (635, 33625), (1345, 15875), (3175, 6725)]