387979880

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{312887}}^1$

素因数の和:312929

約数の個数: 32

約数和(自身を含む): 901117440

約数和(自身を除く): 513137560

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 312887, 625774, 1251548, 1564435, 2503096, 3128870, 6257740, 9699497, 12515480, 19398994, 38797988, 48497485, 77595976, 96994970, 193989940, 387979880]

約数ペア:

[(1, 387979880), (2, 193989940), (4, 96994970), (5, 77595976), (8, 48497485), (10, 38797988), (20, 19398994), (31, 12515480), (40, 9699497), (62, 6257740), (124, 3128870), (155, 2503096), (248, 1564435), (310, 1251548), (620, 625774), (1240, 312887)]