21666125

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{199}}^1$

素因数の和:294

約数の個数: 32

約数和(自身を含む): 29702400

約数和(自身を除く): 8036275

約数列:

[1, 5, 13, 25, 65, 67, 125, 199, 325, 335, 871, 995, 1625, 1675, 2587, 4355, 4975, 8375, 12935, 13333, 21775, 24875, 64675, 66665, 108875, 173329, 323375, 333325, 866645, 1666625, 4333225, 21666125]

約数ペア:

[(1, 21666125), (5, 4333225), (13, 1666625), (25, 866645), (65, 333325), (67, 323375), (125, 173329), (199, 108875), (325, 66665), (335, 64675), (871, 24875), (995, 21775), (1625, 13333), (1675, 12935), (2587, 8375), (4355, 4975)]