12905000

素因数分解:

$2^3\times 5^4\times {\mathrm{29}}^1\times {\mathrm{89}}^1$

素因数の和:144

約数の個数: 80

約数和(自身を含む): 31630500

約数和(自身を除く): 18725500

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, 625, 712, 725, 890, 1000, 1160, 1250, 1450, 1780, 2225, 2500, 2581, 2900, 3560, 3625, 4450, 5000, 5162, 5800, 7250, 8900, 10324, 11125, 12905, 14500, 17800, 18125, 20648, 22250, 25810, 29000, 36250, 44500, 51620, 55625, 64525, 72500, 89000, 103240, 111250, 129050, 145000, 222500, 258100, 322625, 445000, 516200, 645250, 1290500, 1613125, 2581000, 3226250, 6452500, 12905000]

約数ペア:

[(1, 12905000), (2, 6452500), (4, 3226250), (5, 2581000), (8, 1613125), (10, 1290500), (20, 645250), (25, 516200), (29, 445000), (40, 322625), (50, 258100), (58, 222500), (89, 145000), (100, 129050), (116, 111250), (125, 103240), (145, 89000), (178, 72500), (200, 64525), (232, 55625), (250, 51620), (290, 44500), (356, 36250), (445, 29000), (500, 25810), (580, 22250), (625, 20648), (712, 18125), (725, 17800), (890, 14500), (1000, 12905), (1160, 11125), (1250, 10324), (1450, 8900), (1780, 7250), (2225, 5800), (2500, 5162), (2581, 5000), (2900, 4450), (3560, 3625)]