21006951

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{163}}^1$

素因数の和:228

約数の個数: 48

約数和(自身を含む): 35990784

約数和(自身を除く): 14983833

約数列:

[1, 3, 7, 17, 19, 21, 51, 57, 119, 133, 163, 323, 357, 361, 399, 489, 969, 1083, 1141, 2261, 2527, 2771, 3097, 3423, 6137, 6783, 7581, 8313, 9291, 18411, 19397, 21679, 42959, 52649, 58191, 58843, 65037, 128877, 157947, 176529, 368543, 411901, 1000331, 1105629, 1235703, 3000993, 7002317, 21006951]

約数ペア:

[(1, 21006951), (3, 7002317), (7, 3000993), (17, 1235703), (19, 1105629), (21, 1000331), (51, 411901), (57, 368543), (119, 176529), (133, 157947), (163, 128877), (323, 65037), (357, 58843), (361, 58191), (399, 52649), (489, 42959), (969, 21679), (1083, 19397), (1141, 18411), (2261, 9291), (2527, 8313), (2771, 7581), (3097, 6783), (3423, 6137)]