20511075

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{193}}^1$

素因数の和:328

約数の個数: 48

約数和(自身を含む): 37046240

約数和(自身を除く): 16535165

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 109, 193, 195, 325, 327, 545, 579, 965, 975, 1417, 1635, 2509, 2725, 2895, 4251, 4825, 7085, 7527, 8175, 12545, 14475, 21037, 21255, 35425, 37635, 62725, 63111, 105185, 106275, 188175, 273481, 315555, 525925, 820443, 1367405, 1577775, 4102215, 6837025, 20511075]

約数ペア:

[(1, 20511075), (3, 6837025), (5, 4102215), (13, 1577775), (15, 1367405), (25, 820443), (39, 525925), (65, 315555), (75, 273481), (109, 188175), (193, 106275), (195, 105185), (325, 63111), (327, 62725), (545, 37635), (579, 35425), (965, 21255), (975, 21037), (1417, 14475), (1635, 12545), (2509, 8175), (2725, 7527), (2895, 7085), (4251, 4825)]