21605000

素因数分解:

$2^3\times 5^4\times {\mathrm{29}}^1\times {\mathrm{149}}^1$

素因数の和:204

約数の個数: 80

約数和(自身を含む): 52717500

約数和(自身を除く): 31112500

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 29, 40, 50, 58, 100, 116, 125, 145, 149, 200, 232, 250, 290, 298, 500, 580, 596, 625, 725, 745, 1000, 1160, 1192, 1250, 1450, 1490, 2500, 2900, 2980, 3625, 3725, 4321, 5000, 5800, 5960, 7250, 7450, 8642, 14500, 14900, 17284, 18125, 18625, 21605, 29000, 29800, 34568, 36250, 37250, 43210, 72500, 74500, 86420, 93125, 108025, 145000, 149000, 172840, 186250, 216050, 372500, 432100, 540125, 745000, 864200, 1080250, 2160500, 2700625, 4321000, 5401250, 10802500, 21605000]

約数ペア:

[(1, 21605000), (2, 10802500), (4, 5401250), (5, 4321000), (8, 2700625), (10, 2160500), (20, 1080250), (25, 864200), (29, 745000), (40, 540125), (50, 432100), (58, 372500), (100, 216050), (116, 186250), (125, 172840), (145, 149000), (149, 145000), (200, 108025), (232, 93125), (250, 86420), (290, 74500), (298, 72500), (500, 43210), (580, 37250), (596, 36250), (625, 34568), (725, 29800), (745, 29000), (1000, 21605), (1160, 18625), (1192, 18125), (1250, 17284), (1450, 14900), (1490, 14500), (2500, 8642), (2900, 7450), (2980, 7250), (3625, 5960), (3725, 5800), (4321, 5000)]