20781978

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{70687}}^1$

素因数の和:70706

約数の個数: 24

約数和(自身を含む): 48350592

約数和(自身を除く): 27568614

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 147, 294, 70687, 141374, 212061, 424122, 494809, 989618, 1484427, 2968854, 3463663, 6927326, 10390989, 20781978]

約数ペア:

[(1, 20781978), (2, 10390989), (3, 6927326), (6, 3463663), (7, 2968854), (14, 1484427), (21, 989618), (42, 494809), (49, 424122), (98, 212061), (147, 141374), (294, 70687)]