81302960

素因数分解:

$2^4\times 5^1\times {\mathrm{353}}^1\times {\mathrm{2879}}^1$

素因数の和:3245

約数の個数: 40

約数和(自身を含む): 189630720

約数和(自身を除く): 108327760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 353, 706, 1412, 1765, 2824, 2879, 3530, 5648, 5758, 7060, 11516, 14120, 14395, 23032, 28240, 28790, 46064, 57580, 115160, 230320, 1016287, 2032574, 4065148, 5081435, 8130296, 10162870, 16260592, 20325740, 40651480, 81302960]

約数ペア:

[(1, 81302960), (2, 40651480), (4, 20325740), (5, 16260592), (8, 10162870), (10, 8130296), (16, 5081435), (20, 4065148), (40, 2032574), (80, 1016287), (353, 230320), (706, 115160), (1412, 57580), (1765, 46064), (2824, 28790), (2879, 28240), (3530, 23032), (5648, 14395), (5758, 14120), (7060, 11516)]