18991868

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{1231}}^1$

素因数の和:1290

約数の個数: 48

約数和(自身を含む): 41395200

約数和(自身を除く): 22403332

約数列:

[1, 2, 4, 7, 14, 19, 28, 29, 38, 58, 76, 116, 133, 203, 266, 406, 532, 551, 812, 1102, 1231, 2204, 2462, 3857, 4924, 7714, 8617, 15428, 17234, 23389, 34468, 35699, 46778, 71398, 93556, 142796, 163723, 249893, 327446, 499786, 654892, 678281, 999572, 1356562, 2713124, 4747967, 9495934, 18991868]

約数ペア:

[(1, 18991868), (2, 9495934), (4, 4747967), (7, 2713124), (14, 1356562), (19, 999572), (28, 678281), (29, 654892), (38, 499786), (58, 327446), (76, 249893), (116, 163723), (133, 142796), (203, 93556), (266, 71398), (406, 46778), (532, 35699), (551, 34468), (812, 23389), (1102, 17234), (1231, 15428), (2204, 8617), (2462, 7714), (3857, 4924)]