640528

素因数分解:

$2^4\times 7^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1$

素因数の和:84

約数の個数: 60

約数和(自身を含む): 1554960

約数和(自身を除く): 914432

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 38, 43, 49, 56, 76, 86, 98, 112, 133, 152, 172, 196, 266, 301, 304, 344, 392, 532, 602, 688, 784, 817, 931, 1064, 1204, 1634, 1862, 2107, 2128, 2408, 3268, 3724, 4214, 4816, 5719, 6536, 7448, 8428, 11438, 13072, 14896, 16856, 22876, 33712, 40033, 45752, 80066, 91504, 160132, 320264, 640528]

約数ペア:

[(1, 640528), (2, 320264), (4, 160132), (7, 91504), (8, 80066), (14, 45752), (16, 40033), (19, 33712), (28, 22876), (38, 16856), (43, 14896), (49, 13072), (56, 11438), (76, 8428), (86, 7448), (98, 6536), (112, 5719), (133, 4816), (152, 4214), (172, 3724), (196, 3268), (266, 2408), (301, 2128), (304, 2107), (344, 1862), (392, 1634), (532, 1204), (602, 1064), (688, 931), (784, 817)]