28187960

素因数分解:

$2^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{2129}}^1$

素因数の和:2471

約数の個数: 32

約数和(自身を含む): 63644400

約数和(自身を除く): 35456440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 331, 662, 1324, 1655, 2129, 2648, 3310, 4258, 6620, 8516, 10645, 13240, 17032, 21290, 42580, 85160, 704699, 1409398, 2818796, 3523495, 5637592, 7046990, 14093980, 28187960]

約数ペア:

[(1, 28187960), (2, 14093980), (4, 7046990), (5, 5637592), (8, 3523495), (10, 2818796), (20, 1409398), (40, 704699), (331, 85160), (662, 42580), (1324, 21290), (1655, 17032), (2129, 13240), (2648, 10645), (3310, 8516), (4258, 6620)]