20638085

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{983}}^1$

素因数の和:1037

約数の個数: 32

約数和(自身を含む): 29756160

約数和(自身を除く): 9118075

約数列:

[1, 5, 13, 17, 19, 65, 85, 95, 221, 247, 323, 983, 1105, 1235, 1615, 4199, 4915, 12779, 16711, 18677, 20995, 63895, 83555, 93385, 217243, 242801, 317509, 1086215, 1214005, 1587545, 4127617, 20638085]

約数ペア:

[(1, 20638085), (5, 4127617), (13, 1587545), (17, 1214005), (19, 1086215), (65, 317509), (85, 242801), (95, 217243), (221, 93385), (247, 83555), (323, 63895), (983, 20995), (1105, 18677), (1235, 16711), (1615, 12779), (4199, 4915)]