20455720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12473}}^1$

素因数の和:12525

約数の個数: 32

約数和(自身を含む): 47151720

約数和(自身を除く): 26696000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12473, 24946, 49892, 62365, 99784, 124730, 249460, 498920, 511393, 1022786, 2045572, 2556965, 4091144, 5113930, 10227860, 20455720]

約数ペア:

[(1, 20455720), (2, 10227860), (4, 5113930), (5, 4091144), (8, 2556965), (10, 2045572), (20, 1022786), (40, 511393), (41, 498920), (82, 249460), (164, 124730), (205, 99784), (328, 62365), (410, 49892), (820, 24946), (1640, 12473)]