19785375

素因数分解:

$3^2\times 5^3\times {\mathrm{43}}^1\times {\mathrm{409}}^1$

素因数の和:473

約数の個数: 48

約数和(自身を含む): 36585120

約数和(自身を除く): 16799745

約数列:

[1, 3, 5, 9, 15, 25, 43, 45, 75, 125, 129, 215, 225, 375, 387, 409, 645, 1075, 1125, 1227, 1935, 2045, 3225, 3681, 5375, 6135, 9675, 10225, 16125, 17587, 18405, 30675, 48375, 51125, 52761, 87935, 92025, 153375, 158283, 263805, 439675, 460125, 791415, 1319025, 2198375, 3957075, 6595125, 19785375]

約数ペア:

[(1, 19785375), (3, 6595125), (5, 3957075), (9, 2198375), (15, 1319025), (25, 791415), (43, 460125), (45, 439675), (75, 263805), (125, 158283), (129, 153375), (215, 92025), (225, 87935), (375, 52761), (387, 51125), (409, 48375), (645, 30675), (1075, 18405), (1125, 17587), (1227, 16125), (1935, 10225), (2045, 9675), (3225, 6135), (3681, 5375)]