19981857

素因数分解:

$3^1\times 7^2\times {\mathrm{181}}^1\times {\mathrm{751}}^1$

素因数の和:949

約数の個数: 24

約数和(自身を含む): 31204992

約数和(自身を除く): 11223135

約数列:

[1, 3, 7, 21, 49, 147, 181, 543, 751, 1267, 2253, 3801, 5257, 8869, 15771, 26607, 36799, 110397, 135931, 407793, 951517, 2854551, 6660619, 19981857]

約数ペア:

[(1, 19981857), (3, 6660619), (7, 2854551), (21, 951517), (49, 407793), (147, 135931), (181, 110397), (543, 36799), (751, 26607), (1267, 15771), (2253, 8869), (3801, 5257)]