20126505

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{139}}^1\times {\mathrm{197}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 37920960

約数和(自身を除く): 17794455

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 139, 147, 197, 245, 417, 591, 695, 735, 973, 985, 1379, 2085, 2919, 2955, 4137, 4865, 6811, 6895, 9653, 14595, 20433, 20685, 27383, 28959, 34055, 48265, 82149, 102165, 136915, 144795, 191681, 410745, 575043, 958405, 1341767, 2875215, 4025301, 6708835, 20126505]

約数ペア:

[(1, 20126505), (3, 6708835), (5, 4025301), (7, 2875215), (15, 1341767), (21, 958405), (35, 575043), (49, 410745), (105, 191681), (139, 144795), (147, 136915), (197, 102165), (245, 82149), (417, 48265), (591, 34055), (695, 28959), (735, 27383), (973, 20685), (985, 20433), (1379, 14595), (2085, 9653), (2919, 6895), (2955, 6811), (4137, 4865)]