21041715

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{1223}}^1$

素因数の和:1299

約数の個数: 32

約数和(自身を含む): 35721216

約数和(自身を除く): 14679501

約数列:

[1, 3, 5, 15, 31, 37, 93, 111, 155, 185, 465, 555, 1147, 1223, 3441, 3669, 5735, 6115, 17205, 18345, 37913, 45251, 113739, 135753, 189565, 226255, 568695, 678765, 1402781, 4208343, 7013905, 21041715]

約数ペア:

[(1, 21041715), (3, 7013905), (5, 4208343), (15, 1402781), (31, 678765), (37, 568695), (93, 226255), (111, 189565), (155, 135753), (185, 113739), (465, 45251), (555, 37913), (1147, 18345), (1223, 17205), (3441, 6115), (3669, 5735)]