639290428

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{21121}}^1$

素因数の和:21202

約数の個数: 48

約数和(自身を含む): 1362622464

約数和(自身を除く): 723332036

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 47, 92, 94, 161, 188, 322, 329, 644, 658, 1081, 1316, 2162, 4324, 7567, 15134, 21121, 30268, 42242, 84484, 147847, 295694, 485783, 591388, 971566, 992687, 1943132, 1985374, 3400481, 3970748, 6800962, 6948809, 13601924, 13897618, 22831801, 27795236, 45663602, 91327204, 159822607, 319645214, 639290428]

約数ペア:

[(1, 639290428), (2, 319645214), (4, 159822607), (7, 91327204), (14, 45663602), (23, 27795236), (28, 22831801), (46, 13897618), (47, 13601924), (92, 6948809), (94, 6800962), (161, 3970748), (188, 3400481), (322, 1985374), (329, 1943132), (644, 992687), (658, 971566), (1081, 591388), (1316, 485783), (2162, 295694), (4324, 147847), (7567, 84484), (15134, 42242), (21121, 30268)]