20028640

素因数分解:

$2^5\times 5^1\times {\mathrm{151}}^1\times {\mathrm{829}}^1$

素因数の和:995

約数の個数: 48

約数和(自身を含む): 47688480

約数和(自身を除く): 27659840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 151, 160, 302, 604, 755, 829, 1208, 1510, 1658, 2416, 3020, 3316, 4145, 4832, 6040, 6632, 8290, 12080, 13264, 16580, 24160, 26528, 33160, 66320, 125179, 132640, 250358, 500716, 625895, 1001432, 1251790, 2002864, 2503580, 4005728, 5007160, 10014320, 20028640]

約数ペア:

[(1, 20028640), (2, 10014320), (4, 5007160), (5, 4005728), (8, 2503580), (10, 2002864), (16, 1251790), (20, 1001432), (32, 625895), (40, 500716), (80, 250358), (151, 132640), (160, 125179), (302, 66320), (604, 33160), (755, 26528), (829, 24160), (1208, 16580), (1510, 13264), (1658, 12080), (2416, 8290), (3020, 6632), (3316, 6040), (4145, 4832)]