28205680

素因数分解:

$2^4\times 5^1\times {\mathrm{271}}^1\times {\mathrm{1301}}^1$

素因数の和:1585

約数の個数: 40

約数和(自身を含む): 65870784

約数和(自身を除く): 37665104

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271, 542, 1084, 1301, 1355, 2168, 2602, 2710, 4336, 5204, 5420, 6505, 10408, 10840, 13010, 20816, 21680, 26020, 52040, 104080, 352571, 705142, 1410284, 1762855, 2820568, 3525710, 5641136, 7051420, 14102840, 28205680]

約数ペア:

[(1, 28205680), (2, 14102840), (4, 7051420), (5, 5641136), (8, 3525710), (10, 2820568), (16, 1762855), (20, 1410284), (40, 705142), (80, 352571), (271, 104080), (542, 52040), (1084, 26020), (1301, 21680), (1355, 20816), (2168, 13010), (2602, 10840), (2710, 10408), (4336, 6505), (5204, 5420)]