21289625

素因数分解:

$5^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{839}}^1$

素因数の和:890

約数の個数: 32

約数和(自身を含む): 31449600

約数和(自身を除く): 10159975

約数列:

[1, 5, 7, 25, 29, 35, 125, 145, 175, 203, 725, 839, 875, 1015, 3625, 4195, 5075, 5873, 20975, 24331, 25375, 29365, 104875, 121655, 146825, 170317, 608275, 734125, 851585, 3041375, 4257925, 21289625]

約数ペア:

[(1, 21289625), (5, 4257925), (7, 3041375), (25, 851585), (29, 734125), (35, 608275), (125, 170317), (145, 146825), (175, 121655), (203, 104875), (725, 29365), (839, 25375), (875, 24331), (1015, 20975), (3625, 5873), (4195, 5075)]