20296215

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{617}}^1$

素因数の和:688

約数の個数: 48

約数和(自身を含む): 38177568

約数和(自身を除く): 17881353

約数列:

[1, 3, 5, 9, 15, 17, 43, 45, 51, 85, 129, 153, 215, 255, 387, 617, 645, 731, 765, 1851, 1935, 2193, 3085, 3655, 5553, 6579, 9255, 10489, 10965, 26531, 27765, 31467, 32895, 52445, 79593, 94401, 132655, 157335, 238779, 397965, 451027, 472005, 1193895, 1353081, 2255135, 4059243, 6765405, 20296215]

約数ペア:

[(1, 20296215), (3, 6765405), (5, 4059243), (9, 2255135), (15, 1353081), (17, 1193895), (43, 472005), (45, 451027), (51, 397965), (85, 238779), (129, 157335), (153, 132655), (215, 94401), (255, 79593), (387, 52445), (617, 32895), (645, 31467), (731, 27765), (765, 26531), (1851, 10965), (1935, 10489), (2193, 9255), (3085, 6579), (3655, 5553)]