20688375

素因数分解:

$3^1\times 5^3\times {\mathrm{43}}^1\times {\mathrm{1283}}^1$

素因数の和:1344

約数の個数: 32

約数和(自身を含む): 35253504

約数和(自身を除く): 14565129

約数列:

[1, 3, 5, 15, 25, 43, 75, 125, 129, 215, 375, 645, 1075, 1283, 3225, 3849, 5375, 6415, 16125, 19245, 32075, 55169, 96225, 160375, 165507, 275845, 481125, 827535, 1379225, 4137675, 6896125, 20688375]

約数ペア:

[(1, 20688375), (3, 6896125), (5, 4137675), (15, 1379225), (25, 827535), (43, 481125), (75, 275845), (125, 165507), (129, 160375), (215, 96225), (375, 55169), (645, 32075), (1075, 19245), (1283, 16125), (3225, 6415), (3849, 5375)]