81719175

素因数分解:

$3^1\times 5^2\times {\mathrm{389}}^1\times {\mathrm{2801}}^1$

素因数の和:3203

約数の個数: 24

約数和(自身を含む): 135504720

約数和(自身を除く): 53785545

約数列:

[1, 3, 5, 15, 25, 75, 389, 1167, 1945, 2801, 5835, 8403, 9725, 14005, 29175, 42015, 70025, 210075, 1089589, 3268767, 5447945, 16343835, 27239725, 81719175]

約数ペア:

[(1, 81719175), (3, 27239725), (5, 16343835), (15, 5447945), (25, 3268767), (75, 1089589), (389, 210075), (1167, 70025), (1945, 42015), (2801, 29175), (5835, 14005), (8403, 9725)]