217615215

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{647}}^1\times {\mathrm{1319}}^1$

素因数の和:1991

約数の個数: 32

約数和(自身を含む): 369515520

約数和(自身を除く): 151900305

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 647, 1319, 1941, 3235, 3957, 6595, 9705, 10999, 19785, 22423, 32997, 54995, 67269, 112115, 164985, 336345, 853393, 2560179, 4266965, 12800895, 14507681, 43523043, 72538405, 217615215]

約数ペア:

[(1, 217615215), (3, 72538405), (5, 43523043), (15, 14507681), (17, 12800895), (51, 4266965), (85, 2560179), (255, 853393), (647, 336345), (1319, 164985), (1941, 112115), (3235, 67269), (3957, 54995), (6595, 32997), (9705, 22423), (10999, 19785)]