206789375

素因数分解:

$5^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{821}}^1$

素因数の和:885

約数の個数: 40

約数和(自身を含む): 287607936

約数和(自身を除く): 80818561

約数列:

[1, 5, 13, 25, 31, 65, 125, 155, 325, 403, 625, 775, 821, 1625, 2015, 3875, 4105, 8125, 10075, 10673, 19375, 20525, 25451, 50375, 53365, 102625, 127255, 251875, 266825, 330863, 513125, 636275, 1334125, 1654315, 3181375, 6670625, 8271575, 15906875, 41357875, 206789375]

約数ペア:

[(1, 206789375), (5, 41357875), (13, 15906875), (25, 8271575), (31, 6670625), (65, 3181375), (125, 1654315), (155, 1334125), (325, 636275), (403, 513125), (625, 330863), (775, 266825), (821, 251875), (1625, 127255), (2015, 102625), (3875, 53365), (4105, 50375), (8125, 25451), (10075, 20525), (10673, 19375)]