20881445

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{241}}^1$

素因数の和:333

約数の個数: 32

約数和(自身を含む): 28621824

約数和(自身を除く): 7740379

約数列:

[1, 5, 13, 31, 43, 65, 155, 215, 241, 403, 559, 1205, 1333, 2015, 2795, 3133, 6665, 7471, 10363, 15665, 17329, 37355, 51815, 86645, 97123, 134719, 321253, 485615, 673595, 1606265, 4176289, 20881445]

約数ペア:

[(1, 20881445), (5, 4176289), (13, 1606265), (31, 673595), (43, 485615), (65, 321253), (155, 134719), (215, 97123), (241, 86645), (403, 51815), (559, 37355), (1205, 17329), (1333, 15665), (2015, 10363), (2795, 7471), (3133, 6665)]