280440880

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{113081}}^1$

素因数の和:113125

約数の個数: 40

約数和(自身を含む): 673064064

約数和(自身を除く): 392623184

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 113081, 226162, 452324, 565405, 904648, 1130810, 1809296, 2261620, 3505511, 4523240, 7011022, 9046480, 14022044, 17527555, 28044088, 35055110, 56088176, 70110220, 140220440, 280440880]

約数ペア:

[(1, 280440880), (2, 140220440), (4, 70110220), (5, 56088176), (8, 35055110), (10, 28044088), (16, 17527555), (20, 14022044), (31, 9046480), (40, 7011022), (62, 4523240), (80, 3505511), (124, 2261620), (155, 1809296), (248, 1130810), (310, 904648), (496, 565405), (620, 452324), (1240, 226162), (2480, 113081)]