209890945

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1\times {\mathrm{223}}^1$

素因数の和:505

約数の個数: 32

約数和(自身を含む): 280304640

約数和(自身を除く): 70413695

約数列:

[1, 5, 11, 55, 109, 157, 223, 545, 785, 1115, 1199, 1727, 2453, 5995, 8635, 12265, 17113, 24307, 35011, 85565, 121535, 175055, 188243, 267377, 385121, 941215, 1336885, 1925605, 3816199, 19080995, 41978189, 209890945]

約数ペア:

[(1, 209890945), (5, 41978189), (11, 19080995), (55, 3816199), (109, 1925605), (157, 1336885), (223, 941215), (545, 385121), (785, 267377), (1115, 188243), (1199, 175055), (1727, 121535), (2453, 85565), (5995, 35011), (8635, 24307), (12265, 17113)]