290499995

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{179}}^1\times {\mathrm{313}}^1$

素因数の和:575

約数の個数: 32

約数和(自身を含む): 378457920

約数和(自身を除く): 87957925

約数列:

[1, 5, 17, 61, 85, 179, 305, 313, 895, 1037, 1565, 3043, 5185, 5321, 10919, 15215, 19093, 26605, 54595, 56027, 95465, 185623, 280135, 324581, 928115, 952459, 1622905, 3417647, 4762295, 17088235, 58099999, 290499995]

約数ペア:

[(1, 290499995), (5, 58099999), (17, 17088235), (61, 4762295), (85, 3417647), (179, 1622905), (305, 952459), (313, 928115), (895, 324581), (1037, 280135), (1565, 185623), (3043, 95465), (5185, 56027), (5321, 54595), (10919, 26605), (15215, 19093)]