20427915

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{197}}^1\times {\mathrm{223}}^1$

素因数の和:459

約数の個数: 32

約数和(自身を含む): 34062336

約数和(自身を除く): 13634421

約数列:

[1, 3, 5, 15, 31, 93, 155, 197, 223, 465, 591, 669, 985, 1115, 2955, 3345, 6107, 6913, 18321, 20739, 30535, 34565, 43931, 91605, 103695, 131793, 219655, 658965, 1361861, 4085583, 6809305, 20427915]

約数ペア:

[(1, 20427915), (3, 6809305), (5, 4085583), (15, 1361861), (31, 658965), (93, 219655), (155, 131793), (197, 103695), (223, 91605), (465, 43931), (591, 34565), (669, 30535), (985, 20739), (1115, 18321), (2955, 6913), (3345, 6107)]