21266980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21701}}^1$

素因数の和:21724

約数の個数: 36

約数和(自身を含む): 51954588

約数和(自身を除く): 30687608

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21701, 43402, 86804, 108505, 151907, 217010, 303814, 434020, 607628, 759535, 1063349, 1519070, 2126698, 3038140, 4253396, 5316745, 10633490, 21266980]

約数ペア:

[(1, 21266980), (2, 10633490), (4, 5316745), (5, 4253396), (7, 3038140), (10, 2126698), (14, 1519070), (20, 1063349), (28, 759535), (35, 607628), (49, 434020), (70, 303814), (98, 217010), (140, 151907), (196, 108505), (245, 86804), (490, 43402), (980, 21701)]