20875520

素因数分解:

$2^8\times 5^1\times {\mathrm{47}}^1\times {\mathrm{347}}^1$

素因数の和:415

約数の個数: 72

約数和(自身を含む): 51214464

約数和(自身を除く): 30338944

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 47, 64, 80, 94, 128, 160, 188, 235, 256, 320, 347, 376, 470, 640, 694, 752, 940, 1280, 1388, 1504, 1735, 1880, 2776, 3008, 3470, 3760, 5552, 6016, 6940, 7520, 11104, 12032, 13880, 15040, 16309, 22208, 27760, 30080, 32618, 44416, 55520, 60160, 65236, 81545, 88832, 111040, 130472, 163090, 222080, 260944, 326180, 444160, 521888, 652360, 1043776, 1304720, 2087552, 2609440, 4175104, 5218880, 10437760, 20875520]

約数ペア:

[(1, 20875520), (2, 10437760), (4, 5218880), (5, 4175104), (8, 2609440), (10, 2087552), (16, 1304720), (20, 1043776), (32, 652360), (40, 521888), (47, 444160), (64, 326180), (80, 260944), (94, 222080), (128, 163090), (160, 130472), (188, 111040), (235, 88832), (256, 81545), (320, 65236), (347, 60160), (376, 55520), (470, 44416), (640, 32618), (694, 30080), (752, 27760), (940, 22208), (1280, 16309), (1388, 15040), (1504, 13880), (1735, 12032), (1880, 11104), (2776, 7520), (3008, 6940), (3470, 6016), (3760, 5552)]