21706355

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{439}}^1$

素因数の和:515

約数の個数: 32

約数和(自身を含む): 30412800

約数和(自身を除く): 8706445

約数列:

[1, 5, 11, 29, 31, 55, 145, 155, 319, 341, 439, 899, 1595, 1705, 2195, 4495, 4829, 9889, 12731, 13609, 24145, 49445, 63655, 68045, 140041, 149699, 394661, 700205, 748495, 1973305, 4341271, 21706355]

約数ペア:

[(1, 21706355), (5, 4341271), (11, 1973305), (29, 748495), (31, 700205), (55, 394661), (145, 149699), (155, 140041), (319, 68045), (341, 63655), (439, 49445), (899, 24145), (1595, 13609), (1705, 12731), (2195, 9889), (4495, 4829)]