20808355685

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{21247}}^1$

素因数の和:21358

約数の個数: 48

約数和(自身を含む): 28929576960

約数和(自身を除く): 8121221275

約数列:

[1, 5, 13, 19, 61, 65, 95, 169, 247, 305, 793, 845, 1159, 1235, 3211, 3965, 5795, 10309, 15067, 16055, 21247, 51545, 75335, 106235, 195871, 276211, 403693, 979355, 1296067, 1381055, 2018465, 3590743, 5248009, 6480335, 16848871, 17953715, 24625273, 26240045, 68224117, 84244355, 123126365, 219035323, 320128549, 341120585, 1095176615, 1600642745, 4161671137, 20808355685]

約数ペア:

[(1, 20808355685), (5, 4161671137), (13, 1600642745), (19, 1095176615), (61, 341120585), (65, 320128549), (95, 219035323), (169, 123126365), (247, 84244355), (305, 68224117), (793, 26240045), (845, 24625273), (1159, 17953715), (1235, 16848871), (3211, 6480335), (3965, 5248009), (5795, 3590743), (10309, 2018465), (15067, 1381055), (16055, 1296067), (21247, 979355), (51545, 403693), (75335, 276211), (106235, 195871)]