865240

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{223}}^1$

素因数の和:331

約数の個数: 32

約数和(自身を含む): 1975680

約数和(自身を除く): 1110440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 223, 388, 446, 485, 776, 892, 970, 1115, 1784, 1940, 2230, 3880, 4460, 8920, 21631, 43262, 86524, 108155, 173048, 216310, 432620, 865240]

約数ペア:

[(1, 865240), (2, 432620), (4, 216310), (5, 173048), (8, 108155), (10, 86524), (20, 43262), (40, 21631), (97, 8920), (194, 4460), (223, 3880), (388, 2230), (446, 1940), (485, 1784), (776, 1115), (892, 970)]