20996260

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^2\times {\mathrm{197}}^1$

素因数の和:352

約数の個数: 36

約数和(自身を含む): 44931348

約数和(自身を除く): 23935088

約数列:

[1, 2, 4, 5, 10, 20, 73, 146, 197, 292, 365, 394, 730, 788, 985, 1460, 1970, 3940, 5329, 10658, 14381, 21316, 26645, 28762, 53290, 57524, 71905, 106580, 143810, 287620, 1049813, 2099626, 4199252, 5249065, 10498130, 20996260]

約数ペア:

[(1, 20996260), (2, 10498130), (4, 5249065), (5, 4199252), (10, 2099626), (20, 1049813), (73, 287620), (146, 143810), (197, 106580), (292, 71905), (365, 57524), (394, 53290), (730, 28762), (788, 26645), (985, 21316), (1460, 14381), (1970, 10658), (3940, 5329)]