20897505

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{463}}^1$

素因数の和:550

約数の個数: 48

約数和(自身を含む): 39087360

約数和(自身を除く): 18189855

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 59, 85, 153, 177, 255, 295, 463, 531, 765, 885, 1003, 1389, 2315, 2655, 3009, 4167, 5015, 6945, 7871, 9027, 15045, 20835, 23613, 27317, 39355, 45135, 70839, 81951, 118065, 136585, 245853, 354195, 409755, 464389, 1229265, 1393167, 2321945, 4179501, 6965835, 20897505]

約数ペア:

[(1, 20897505), (3, 6965835), (5, 4179501), (9, 2321945), (15, 1393167), (17, 1229265), (45, 464389), (51, 409755), (59, 354195), (85, 245853), (153, 136585), (177, 118065), (255, 81951), (295, 70839), (463, 45135), (531, 39355), (765, 27317), (885, 23613), (1003, 20835), (1389, 15045), (2315, 9027), (2655, 7871), (3009, 6945), (4167, 5015)]