21640065

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{751}}^1$

素因数の和:889

約数の個数: 32

約数和(自身を含む): 37034496

約数和(自身を除く): 15394431

約数列:

[1, 3, 5, 15, 17, 51, 85, 113, 255, 339, 565, 751, 1695, 1921, 2253, 3755, 5763, 9605, 11265, 12767, 28815, 38301, 63835, 84863, 191505, 254589, 424315, 1272945, 1442671, 4328013, 7213355, 21640065]

約数ペア:

[(1, 21640065), (3, 7213355), (5, 4328013), (15, 1442671), (17, 1272945), (51, 424315), (85, 254589), (113, 191505), (255, 84863), (339, 63835), (565, 38301), (751, 28815), (1695, 12767), (1921, 11265), (2253, 9605), (3755, 5763)]