2642440

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{2131}}^1$

素因数の和:2173

約数の個数: 32

約数和(自身を含む): 6140160

約数和(自身を除く): 3497720

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 2131, 4262, 8524, 10655, 17048, 21310, 42620, 66061, 85240, 132122, 264244, 330305, 528488, 660610, 1321220, 2642440]

約数ペア:

[(1, 2642440), (2, 1321220), (4, 660610), (5, 528488), (8, 330305), (10, 264244), (20, 132122), (31, 85240), (40, 66061), (62, 42620), (124, 21310), (155, 17048), (248, 10655), (310, 8524), (620, 4262), (1240, 2131)]