28488280

素因数分解:

$2^3\times 5^1\times {\mathrm{521}}^1\times {\mathrm{1367}}^1$

素因数の和:1899

約数の個数: 32

約数和(自身を含む): 64268640

約数和(自身を除く): 35780360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 521, 1042, 1367, 2084, 2605, 2734, 4168, 5210, 5468, 6835, 10420, 10936, 13670, 20840, 27340, 54680, 712207, 1424414, 2848828, 3561035, 5697656, 7122070, 14244140, 28488280]

約数ペア:

[(1, 28488280), (2, 14244140), (4, 7122070), (5, 5697656), (8, 3561035), (10, 2848828), (20, 1424414), (40, 712207), (521, 54680), (1042, 27340), (1367, 20840), (2084, 13670), (2605, 10936), (2734, 10420), (4168, 6835), (5210, 5468)]