21390808

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{140729}}^1$

素因数の和:140754

約数の個数: 16

約数和(自身を含む): 42219000

約数和(自身を除く): 20828192

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 140729, 281458, 562916, 1125832, 2673851, 5347702, 10695404, 21390808]

約数ペア:

[(1, 21390808), (2, 10695404), (4, 5347702), (8, 2673851), (19, 1125832), (38, 562916), (76, 281458), (152, 140729)]