21677990

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{69929}}^1$

素因数の和:69967

約数の個数: 16

約数和(自身を含む): 40279680

約数和(自身を除く): 18601690

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 69929, 139858, 349645, 699290, 2167799, 4335598, 10838995, 21677990]

約数ペア:

[(1, 21677990), (2, 10838995), (5, 4335598), (10, 2167799), (31, 699290), (62, 349645), (155, 139858), (310, 69929)]