2900000

素因数分解:

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

素因数の和:64

約数の個数: 72

約数和(自身を含む): 7382340

約数和(自身を除く): 4482340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 29, 32, 40, 50, 58, 80, 100, 116, 125, 145, 160, 200, 232, 250, 290, 400, 464, 500, 580, 625, 725, 800, 928, 1000, 1160, 1250, 1450, 2000, 2320, 2500, 2900, 3125, 3625, 4000, 4640, 5000, 5800, 6250, 7250, 10000, 11600, 12500, 14500, 18125, 20000, 23200, 25000, 29000, 36250, 50000, 58000, 72500, 90625, 100000, 116000, 145000, 181250, 290000, 362500, 580000, 725000, 1450000, 2900000]

約数ペア:

[(1, 2900000), (2, 1450000), (4, 725000), (5, 580000), (8, 362500), (10, 290000), (16, 181250), (20, 145000), (25, 116000), (29, 100000), (32, 90625), (40, 72500), (50, 58000), (58, 50000), (80, 36250), (100, 29000), (116, 25000), (125, 23200), (145, 20000), (160, 18125), (200, 14500), (232, 12500), (250, 11600), (290, 10000), (400, 7250), (464, 6250), (500, 5800), (580, 5000), (625, 4640), (725, 4000), (800, 3625), (928, 3125), (1000, 2900), (1160, 2500), (1250, 2320), (1450, 2000)]