21092555

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:275

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7937845

約数列:

[1, 5, 11, 31, 55, 89, 139, 155, 341, 445, 695, 979, 1529, 1705, 2759, 4309, 4895, 7645, 12371, 13795, 21545, 30349, 47399, 61855, 136081, 151745, 236995, 383501, 680405, 1917505, 4218511, 21092555]

約数ペア:

[(1, 21092555), (5, 4218511), (11, 1917505), (31, 680405), (55, 383501), (89, 236995), (139, 151745), (155, 136081), (341, 61855), (445, 47399), (695, 30349), (979, 21545), (1529, 13795), (1705, 12371), (2759, 7645), (4309, 4895)]