81438140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{581701}}^1$

素因数の和:581717

約数の個数: 24

約数和(自身を含む): 195451872

約数和(自身を除く): 114013732

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 581701, 1163402, 2326804, 2908505, 4071907, 5817010, 8143814, 11634020, 16287628, 20359535, 40719070, 81438140]

約数ペア:

[(1, 81438140), (2, 40719070), (4, 20359535), (5, 16287628), (7, 11634020), (10, 8143814), (14, 5817010), (20, 4071907), (28, 2908505), (35, 2326804), (70, 1163402), (140, 581701)]