21987410

素因数分解:

$2^1\times 5^1\times {\mathrm{103}}^1\times {\mathrm{21347}}^1$

素因数の和:21457

約数の個数: 16

約数和(自身を含む): 39963456

約数和(自身を除く): 17976046

約数列:

[1, 2, 5, 10, 103, 206, 515, 1030, 21347, 42694, 106735, 213470, 2198741, 4397482, 10993705, 21987410]

約数ペア:

[(1, 21987410), (2, 10993705), (5, 4397482), (10, 2198741), (103, 213470), (206, 106735), (515, 42694), (1030, 21347)]