28207820

素因数分解:

$2^2\times 5^1\times {\mathrm{331}}^1\times {\mathrm{4261}}^1$

素因数の和:4601

約数の個数: 24

約数和(自身を含む): 59429328

約数和(自身を除く): 31221508

約数列:

[1, 2, 4, 5, 10, 20, 331, 662, 1324, 1655, 3310, 4261, 6620, 8522, 17044, 21305, 42610, 85220, 1410391, 2820782, 5641564, 7051955, 14103910, 28207820]

約数ペア:

[(1, 28207820), (2, 14103910), (4, 7051955), (5, 5641564), (10, 2820782), (20, 1410391), (331, 85220), (662, 42610), (1324, 21305), (1655, 17044), (3310, 8522), (4261, 6620)]