18748535

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{47}}^1$

素因数の和:120

約数の個数: 48

約数和(自身を含む): 27651456

約数和(自身を除く): 8902921

約数列:

[1, 5, 13, 17, 19, 47, 65, 85, 95, 221, 235, 247, 323, 361, 611, 799, 893, 1105, 1235, 1615, 1805, 3055, 3995, 4199, 4465, 4693, 6137, 10387, 11609, 15181, 16967, 20995, 23465, 30685, 51935, 58045, 75905, 79781, 84835, 197353, 220571, 288439, 398905, 986765, 1102855, 1442195, 3749707, 18748535]

約数ペア:

[(1, 18748535), (5, 3749707), (13, 1442195), (17, 1102855), (19, 986765), (47, 398905), (65, 288439), (85, 220571), (95, 197353), (221, 84835), (235, 79781), (247, 75905), (323, 58045), (361, 51935), (611, 30685), (799, 23465), (893, 20995), (1105, 16967), (1235, 15181), (1615, 11609), (1805, 10387), (3055, 6137), (3995, 4693), (4199, 4465)]