2581000

素因数分解:

$2^3\times 5^3\times {\mathrm{29}}^1\times {\mathrm{89}}^1$

素因数の和:139

約数の個数: 64

約数和(自身を含む): 6318000

約数和(自身を除く): 3737000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 29, 40, 50, 58, 89, 100, 116, 125, 145, 178, 200, 232, 250, 290, 356, 445, 500, 580, 712, 725, 890, 1000, 1160, 1450, 1780, 2225, 2581, 2900, 3560, 3625, 4450, 5162, 5800, 7250, 8900, 10324, 11125, 12905, 14500, 17800, 20648, 22250, 25810, 29000, 44500, 51620, 64525, 89000, 103240, 129050, 258100, 322625, 516200, 645250, 1290500, 2581000]

約数ペア:

[(1, 2581000), (2, 1290500), (4, 645250), (5, 516200), (8, 322625), (10, 258100), (20, 129050), (25, 103240), (29, 89000), (40, 64525), (50, 51620), (58, 44500), (89, 29000), (100, 25810), (116, 22250), (125, 20648), (145, 17800), (178, 14500), (200, 12905), (232, 11125), (250, 10324), (290, 8900), (356, 7250), (445, 5800), (500, 5162), (580, 4450), (712, 3625), (725, 3560), (890, 2900), (1000, 2581), (1160, 2225), (1450, 1780)]