20792840

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{251}}^1$

素因数の和:390

約数の個数: 64

約数和(自身を含む): 49896000

約数和(自身を除く): 29103160

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 109, 152, 190, 218, 251, 380, 436, 502, 545, 760, 872, 1004, 1090, 1255, 2008, 2071, 2180, 2510, 4142, 4360, 4769, 5020, 8284, 9538, 10040, 10355, 16568, 19076, 20710, 23845, 27359, 38152, 41420, 47690, 54718, 82840, 95380, 109436, 136795, 190760, 218872, 273590, 519821, 547180, 1039642, 1094360, 2079284, 2599105, 4158568, 5198210, 10396420, 20792840]

約数ペア:

[(1, 20792840), (2, 10396420), (4, 5198210), (5, 4158568), (8, 2599105), (10, 2079284), (19, 1094360), (20, 1039642), (38, 547180), (40, 519821), (76, 273590), (95, 218872), (109, 190760), (152, 136795), (190, 109436), (218, 95380), (251, 82840), (380, 54718), (436, 47690), (502, 41420), (545, 38152), (760, 27359), (872, 23845), (1004, 20710), (1090, 19076), (1255, 16568), (2008, 10355), (2071, 10040), (2180, 9538), (2510, 8284), (4142, 5020), (4360, 4769)]