28438340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2861}}^1$

素因数の和:2948

約数の個数: 48

約数和(自身を含む): 69237504

約数和(自身を除く): 40799164

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, 2861, 4970, 5722, 9940, 11444, 14305, 20027, 28610, 40054, 57220, 80108, 100135, 200270, 203131, 400540, 406262, 812524, 1015655, 1421917, 2031310, 2843834, 4062620, 5687668, 7109585, 14219170, 28438340]

約数ペア:

[(1, 28438340), (2, 14219170), (4, 7109585), (5, 5687668), (7, 4062620), (10, 2843834), (14, 2031310), (20, 1421917), (28, 1015655), (35, 812524), (70, 406262), (71, 400540), (140, 203131), (142, 200270), (284, 100135), (355, 80108), (497, 57220), (710, 40054), (994, 28610), (1420, 20027), (1988, 14305), (2485, 11444), (2861, 9940), (4970, 5722)]