20984560

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{5581}}^1$

素因数の和:5641

約数の個数: 40

約数和(自身を含む): 49836096

約数和(自身を除く): 28851536

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 80, 94, 188, 235, 376, 470, 752, 940, 1880, 3760, 5581, 11162, 22324, 27905, 44648, 55810, 89296, 111620, 223240, 262307, 446480, 524614, 1049228, 1311535, 2098456, 2623070, 4196912, 5246140, 10492280, 20984560]

約数ペア:

[(1, 20984560), (2, 10492280), (4, 5246140), (5, 4196912), (8, 2623070), (10, 2098456), (16, 1311535), (20, 1049228), (40, 524614), (47, 446480), (80, 262307), (94, 223240), (188, 111620), (235, 89296), (376, 55810), (470, 44648), (752, 27905), (940, 22324), (1880, 11162), (3760, 5581)]