21203988695

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{1009}}^1\times {\mathrm{221209}}^1$

素因数の和:222242

約数の個数: 16

約数和(自身を含む): 26810652000

約数和(自身を除く): 5606663305

約数列:

[1, 5, 19, 95, 1009, 5045, 19171, 95855, 221209, 1106045, 4202971, 21014855, 223199881, 1115999405, 4240797739, 21203988695]

約数ペア:

[(1, 21203988695), (5, 4240797739), (19, 1115999405), (95, 223199881), (1009, 21014855), (5045, 4202971), (19171, 1106045), (95855, 221209)]