19913439

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{181}}^1$

素因数の和:248

約数の個数: 48

約数和(自身を含む): 34105344

約数和(自身を除く): 14191905

約数列:

[1, 3, 7, 13, 21, 31, 39, 91, 93, 169, 181, 217, 273, 403, 507, 543, 651, 1183, 1209, 1267, 2353, 2821, 3549, 3801, 5239, 5611, 7059, 8463, 15717, 16471, 16833, 30589, 36673, 39277, 49413, 72943, 91767, 110019, 117831, 214123, 218829, 510601, 642369, 948259, 1531803, 2844777, 6637813, 19913439]

約数ペア:

[(1, 19913439), (3, 6637813), (7, 2844777), (13, 1531803), (21, 948259), (31, 642369), (39, 510601), (91, 218829), (93, 214123), (169, 117831), (181, 110019), (217, 91767), (273, 72943), (403, 49413), (507, 39277), (543, 36673), (651, 30589), (1183, 16833), (1209, 16471), (1267, 15717), (2353, 8463), (2821, 7059), (3549, 5611), (3801, 5239)]