18813207

素因数分解:

$3^1\times 7^3\times {\mathrm{47}}^1\times {\mathrm{389}}^1$

素因数の和:460

約数の個数: 32

約数和(自身を含む): 29952000

約数和(自身を除く): 11138793

約数列:

[1, 3, 7, 21, 47, 49, 141, 147, 329, 343, 389, 987, 1029, 1167, 2303, 2723, 6909, 8169, 16121, 18283, 19061, 48363, 54849, 57183, 127981, 133427, 383943, 400281, 895867, 2687601, 6271069, 18813207]

約数ペア:

[(1, 18813207), (3, 6271069), (7, 2687601), (21, 895867), (47, 400281), (49, 383943), (141, 133427), (147, 127981), (329, 57183), (343, 54849), (389, 48363), (987, 19061), (1029, 18283), (1167, 16121), (2303, 8169), (2723, 6909)]