28160020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2833}}^1$

素因数の和:2920

約数の個数: 48

約数和(自身を含む): 68560128

約数和(自身を除く): 40400108

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1988, 2485, 2833, 4970, 5666, 9940, 11332, 14165, 19831, 28330, 39662, 56660, 79324, 99155, 198310, 201143, 396620, 402286, 804572, 1005715, 1408001, 2011430, 2816002, 4022860, 5632004, 7040005, 14080010, 28160020]

約数ペア:

[(1, 28160020), (2, 14080010), (4, 7040005), (5, 5632004), (7, 4022860), (10, 2816002), (14, 2011430), (20, 1408001), (28, 1005715), (35, 804572), (70, 402286), (71, 396620), (140, 201143), (142, 198310), (284, 99155), (355, 79324), (497, 56660), (710, 39662), (994, 28330), (1420, 19831), (1988, 14165), (2485, 11332), (2833, 9940), (4970, 5666)]