21068925

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{139}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 36664320

約数和(自身を除く): 15595395

約数列:

[1, 3, 5, 15, 25, 43, 47, 75, 129, 139, 141, 215, 235, 417, 645, 695, 705, 1075, 1175, 2021, 2085, 3225, 3475, 3525, 5977, 6063, 6533, 10105, 10425, 17931, 19599, 29885, 30315, 32665, 50525, 89655, 97995, 149425, 151575, 163325, 280919, 448275, 489975, 842757, 1404595, 4213785, 7022975, 21068925]

約数ペア:

[(1, 21068925), (3, 7022975), (5, 4213785), (15, 1404595), (25, 842757), (43, 489975), (47, 448275), (75, 280919), (129, 163325), (139, 151575), (141, 149425), (215, 97995), (235, 89655), (417, 50525), (645, 32665), (695, 30315), (705, 29885), (1075, 19599), (1175, 17931), (2021, 10425), (2085, 10105), (3225, 6533), (3475, 6063), (3525, 5977)]