1290500

素因数分解:

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

素因数の和:137

約数の個数: 48

約数和(自身を含む): 2948400

約数和(自身を除く): 1657900

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 50, 58, 89, 100, 116, 125, 145, 178, 250, 290, 356, 445, 500, 580, 725, 890, 1450, 1780, 2225, 2581, 2900, 3625, 4450, 5162, 7250, 8900, 10324, 11125, 12905, 14500, 22250, 25810, 44500, 51620, 64525, 129050, 258100, 322625, 645250, 1290500]

約数ペア:

[(1, 1290500), (2, 645250), (4, 322625), (5, 258100), (10, 129050), (20, 64525), (25, 51620), (29, 44500), (50, 25810), (58, 22250), (89, 14500), (100, 12905), (116, 11125), (125, 10324), (145, 8900), (178, 7250), (250, 5162), (290, 4450), (356, 3625), (445, 2900), (500, 2581), (580, 2225), (725, 1780), (890, 1450)]