21212800

素因数分解:

$2^7\times 5^2\times 7^1\times {\mathrm{947}}^1$

素因数の和:978

約数の個数: 96

約数和(自身を含む): 59951520

約数和(自身を除く): 38738720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 50, 56, 64, 70, 80, 100, 112, 128, 140, 160, 175, 200, 224, 280, 320, 350, 400, 448, 560, 640, 700, 800, 896, 947, 1120, 1400, 1600, 1894, 2240, 2800, 3200, 3788, 4480, 4735, 5600, 6629, 7576, 9470, 11200, 13258, 15152, 18940, 22400, 23675, 26516, 30304, 33145, 37880, 47350, 53032, 60608, 66290, 75760, 94700, 106064, 121216, 132580, 151520, 165725, 189400, 212128, 265160, 303040, 331450, 378800, 424256, 530320, 606080, 662900, 757600, 848512, 1060640, 1325800, 1515200, 2121280, 2651600, 3030400, 4242560, 5303200, 10606400, 21212800]

約数ペア:

[(1, 21212800), (2, 10606400), (4, 5303200), (5, 4242560), (7, 3030400), (8, 2651600), (10, 2121280), (14, 1515200), (16, 1325800), (20, 1060640), (25, 848512), (28, 757600), (32, 662900), (35, 606080), (40, 530320), (50, 424256), (56, 378800), (64, 331450), (70, 303040), (80, 265160), (100, 212128), (112, 189400), (128, 165725), (140, 151520), (160, 132580), (175, 121216), (200, 106064), (224, 94700), (280, 75760), (320, 66290), (350, 60608), (400, 53032), (448, 47350), (560, 37880), (640, 33145), (700, 30304), (800, 26516), (896, 23675), (947, 22400), (1120, 18940), (1400, 15152), (1600, 13258), (1894, 11200), (2240, 9470), (2800, 7576), (3200, 6629), (3788, 5600), (4480, 4735)]