20988625

素因数分解:

$5^3\times 7^1\times {\mathrm{17}}^2\times {\mathrm{83}}^1$

素因数の和:139

約数の個数: 48

約数和(自身を含む): 32183424

約数和(自身を除く): 11194799

約数列:

[1, 5, 7, 17, 25, 35, 83, 85, 119, 125, 175, 289, 415, 425, 581, 595, 875, 1411, 1445, 2023, 2075, 2125, 2905, 2975, 7055, 7225, 9877, 10115, 10375, 14525, 14875, 23987, 35275, 36125, 49385, 50575, 72625, 119935, 167909, 176375, 246925, 252875, 599675, 839545, 1234625, 2998375, 4197725, 20988625]

約数ペア:

[(1, 20988625), (5, 4197725), (7, 2998375), (17, 1234625), (25, 839545), (35, 599675), (83, 252875), (85, 246925), (119, 176375), (125, 167909), (175, 119935), (289, 72625), (415, 50575), (425, 49385), (581, 36125), (595, 35275), (875, 23987), (1411, 14875), (1445, 14525), (2023, 10375), (2075, 10115), (2125, 9877), (2905, 7225), (2975, 7055)]