18938985

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{241}}^1$

素因数の和:306

約数の個数: 48

約数和(自身を含む): 34011648

約数和(自身を除く): 15072663

約数列:

[1, 3, 5, 13, 15, 31, 39, 65, 93, 155, 169, 195, 241, 403, 465, 507, 723, 845, 1205, 1209, 2015, 2535, 3133, 3615, 5239, 6045, 7471, 9399, 15665, 15717, 22413, 26195, 37355, 40729, 46995, 78585, 97123, 112065, 122187, 203645, 291369, 485615, 610935, 1262599, 1456845, 3787797, 6312995, 18938985]

約数ペア:

[(1, 18938985), (3, 6312995), (5, 3787797), (13, 1456845), (15, 1262599), (31, 610935), (39, 485615), (65, 291369), (93, 203645), (155, 122187), (169, 112065), (195, 97123), (241, 78585), (403, 46995), (465, 40729), (507, 37355), (723, 26195), (845, 22413), (1205, 15717), (1209, 15665), (2015, 9399), (2535, 7471), (3133, 6045), (3615, 5239)]