21000658256

素因数分解:

$2^4\times {\mathrm{571}}^1\times {\mathrm{2298671}}^1$

素因数の和:2299250

約数の個数: 20

約数和(自身を含む): 40760051904

約数和(自身を除く): 19759393648

約数列:

[1, 2, 4, 8, 16, 571, 1142, 2284, 4568, 9136, 2298671, 4597342, 9194684, 18389368, 36778736, 1312541141, 2625082282, 5250164564, 10500329128, 21000658256]

約数ペア:

[(1, 21000658256), (2, 10500329128), (4, 5250164564), (8, 2625082282), (16, 1312541141), (571, 36778736), (1142, 18389368), (2284, 9194684), (4568, 4597342), (9136, 2298671)]