20839504

素因数分解:

$2^4\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1399}}^1$

素因数の和:1440

約数の個数: 60

約数和(自身を含む): 49476000

約数和(自身を除く): 28636496

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 38, 49, 56, 76, 98, 112, 133, 152, 196, 266, 304, 392, 532, 784, 931, 1064, 1399, 1862, 2128, 2798, 3724, 5596, 7448, 9793, 11192, 14896, 19586, 22384, 26581, 39172, 53162, 68551, 78344, 106324, 137102, 156688, 186067, 212648, 274204, 372134, 425296, 548408, 744268, 1096816, 1302469, 1488536, 2604938, 2977072, 5209876, 10419752, 20839504]

約数ペア:

[(1, 20839504), (2, 10419752), (4, 5209876), (7, 2977072), (8, 2604938), (14, 1488536), (16, 1302469), (19, 1096816), (28, 744268), (38, 548408), (49, 425296), (56, 372134), (76, 274204), (98, 212648), (112, 186067), (133, 156688), (152, 137102), (196, 106324), (266, 78344), (304, 68551), (392, 53162), (532, 39172), (784, 26581), (931, 22384), (1064, 19586), (1399, 14896), (1862, 11192), (2128, 9793), (2798, 7448), (3724, 5596)]