28104020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{1019}}^1$

素因数の和:1232

約数の個数: 48

約数和(自身を含む): 67858560

約数和(自身を除く): 39754540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 197, 394, 788, 985, 1019, 1379, 1970, 2038, 2758, 3940, 4076, 5095, 5516, 6895, 7133, 10190, 13790, 14266, 20380, 27580, 28532, 35665, 71330, 142660, 200743, 401486, 802972, 1003715, 1405201, 2007430, 2810402, 4014860, 5620804, 7026005, 14052010, 28104020]

約数ペア:

[(1, 28104020), (2, 14052010), (4, 7026005), (5, 5620804), (7, 4014860), (10, 2810402), (14, 2007430), (20, 1405201), (28, 1003715), (35, 802972), (70, 401486), (140, 200743), (197, 142660), (394, 71330), (788, 35665), (985, 28532), (1019, 27580), (1379, 20380), (1970, 14266), (2038, 13790), (2758, 10190), (3940, 7133), (4076, 6895), (5095, 5516)]