20781992

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^2\times {\mathrm{3067}}^1$

素因数の和:3102

約数の個数: 48

約数和(自身を含む): 48965280

約数和(自身を除く): 28183288

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 77, 88, 121, 154, 242, 308, 484, 616, 847, 968, 1694, 3067, 3388, 6134, 6776, 12268, 21469, 24536, 33737, 42938, 67474, 85876, 134948, 171752, 236159, 269896, 371107, 472318, 742214, 944636, 1484428, 1889272, 2597749, 2968856, 5195498, 10390996, 20781992]

約数ペア:

[(1, 20781992), (2, 10390996), (4, 5195498), (7, 2968856), (8, 2597749), (11, 1889272), (14, 1484428), (22, 944636), (28, 742214), (44, 472318), (56, 371107), (77, 269896), (88, 236159), (121, 171752), (154, 134948), (242, 85876), (308, 67474), (484, 42938), (616, 33737), (847, 24536), (968, 21469), (1694, 12268), (3067, 6776), (3388, 6134)]