21091216

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{69379}}^1$

素因数の和:69406

約数の個数: 20

約数和(自身を含む): 43015600

約数和(自身を除く): 21924384

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 69379, 138758, 277516, 555032, 1110064, 1318201, 2636402, 5272804, 10545608, 21091216]

約数ペア:

[(1, 21091216), (2, 10545608), (4, 5272804), (8, 2636402), (16, 1318201), (19, 1110064), (38, 555032), (76, 277516), (152, 138758), (304, 69379)]