20816680

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{7129}}^1$

素因数の和:7213

約数の個数: 32

約数和(自身を含む): 47485800

約数和(自身を除く): 26669120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 7129, 14258, 28516, 35645, 57032, 71290, 142580, 285160, 520417, 1040834, 2081668, 2602085, 4163336, 5204170, 10408340, 20816680]

約数ペア:

[(1, 20816680), (2, 10408340), (4, 5204170), (5, 4163336), (8, 2602085), (10, 2081668), (20, 1040834), (40, 520417), (73, 285160), (146, 142580), (292, 71290), (365, 57032), (584, 35645), (730, 28516), (1460, 14258), (2920, 7129)]