18741515

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{131}}^1$

素因数の和:251

約数の個数: 32

約数和(自身を含む): 25546752

約数和(自身を除く): 6805237

約数列:

[1, 5, 13, 31, 65, 71, 131, 155, 355, 403, 655, 923, 1703, 2015, 2201, 4061, 4615, 8515, 9301, 11005, 20305, 28613, 46505, 52793, 120913, 143065, 263965, 288331, 604565, 1441655, 3748303, 18741515]

約数ペア:

[(1, 18741515), (5, 3748303), (13, 1441655), (31, 604565), (65, 288331), (71, 263965), (131, 143065), (155, 120913), (355, 52793), (403, 46505), (655, 28613), (923, 20305), (1703, 11005), (2015, 9301), (2201, 8515), (4061, 4615)]