18715905

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{107}}^1$

素因数の和:167

約数の個数: 72

約数和(自身を含む): 36998208

約数和(自身を除く): 18282303

約数列:

[1, 3, 5, 9, 13, 15, 23, 39, 45, 65, 69, 107, 115, 117, 169, 195, 207, 299, 321, 345, 507, 535, 585, 845, 897, 963, 1035, 1391, 1495, 1521, 1605, 2461, 2535, 2691, 3887, 4173, 4485, 4815, 6955, 7383, 7605, 11661, 12305, 12519, 13455, 18083, 19435, 20865, 22149, 31993, 34983, 36915, 54249, 58305, 62595, 90415, 95979, 110745, 159965, 162747, 174915, 271245, 287937, 415909, 479895, 813735, 1247727, 1439685, 2079545, 3743181, 6238635, 18715905]

約数ペア:

[(1, 18715905), (3, 6238635), (5, 3743181), (9, 2079545), (13, 1439685), (15, 1247727), (23, 813735), (39, 479895), (45, 415909), (65, 287937), (69, 271245), (107, 174915), (115, 162747), (117, 159965), (169, 110745), (195, 95979), (207, 90415), (299, 62595), (321, 58305), (345, 54249), (507, 36915), (535, 34983), (585, 31993), (845, 22149), (897, 20865), (963, 19435), (1035, 18083), (1391, 13455), (1495, 12519), (1521, 12305), (1605, 11661), (2461, 7605), (2535, 7383), (2691, 6955), (3887, 4815), (4173, 4485)]