21279580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{8941}}^1$

素因数の和:8974

約数の個数: 48

約数和(自身を含む): 54081216

約数和(自身を除く): 32801636

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 68, 70, 85, 119, 140, 170, 238, 340, 476, 595, 1190, 2380, 8941, 17882, 35764, 44705, 62587, 89410, 125174, 151997, 178820, 250348, 303994, 312935, 607988, 625870, 759985, 1063979, 1251740, 1519970, 2127958, 3039940, 4255916, 5319895, 10639790, 21279580]

約数ペア:

[(1, 21279580), (2, 10639790), (4, 5319895), (5, 4255916), (7, 3039940), (10, 2127958), (14, 1519970), (17, 1251740), (20, 1063979), (28, 759985), (34, 625870), (35, 607988), (68, 312935), (70, 303994), (85, 250348), (119, 178820), (140, 151997), (170, 125174), (238, 89410), (340, 62587), (476, 44705), (595, 35764), (1190, 17882), (2380, 8941)]