28253740

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1\times {\mathrm{197}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 61072704

約数和(自身を除く): 32818964

約数列:

[1, 2, 4, 5, 10, 20, 71, 101, 142, 197, 202, 284, 355, 394, 404, 505, 710, 788, 985, 1010, 1420, 1970, 2020, 3940, 7171, 13987, 14342, 19897, 27974, 28684, 35855, 39794, 55948, 69935, 71710, 79588, 99485, 139870, 143420, 198970, 279740, 397940, 1412687, 2825374, 5650748, 7063435, 14126870, 28253740]

約数ペア:

[(1, 28253740), (2, 14126870), (4, 7063435), (5, 5650748), (10, 2825374), (20, 1412687), (71, 397940), (101, 279740), (142, 198970), (197, 143420), (202, 139870), (284, 99485), (355, 79588), (394, 71710), (404, 69935), (505, 55948), (710, 39794), (788, 35855), (985, 28684), (1010, 27974), (1420, 19897), (1970, 14342), (2020, 13987), (3940, 7171)]