81744920

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{19841}}^1$

素因数の和:19955

約数の個数: 32

約数和(自身を含む): 185721120

約数和(自身を除く): 103976200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 19841, 39682, 79364, 99205, 158728, 198410, 396820, 793640, 2043623, 4087246, 8174492, 10218115, 16348984, 20436230, 40872460, 81744920]

約数ペア:

[(1, 81744920), (2, 40872460), (4, 20436230), (5, 16348984), (8, 10218115), (10, 8174492), (20, 4087246), (40, 2043623), (103, 793640), (206, 396820), (412, 198410), (515, 158728), (824, 99205), (1030, 79364), (2060, 39682), (4120, 19841)]