21139566

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{10709}}^1$

素因数の和:10768

約数の個数: 32

約数和(自身を含む): 49351680

約数和(自身を除く): 28212114

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 47, 94, 141, 282, 329, 658, 987, 1974, 10709, 21418, 32127, 64254, 74963, 149926, 224889, 449778, 503323, 1006646, 1509969, 3019938, 3523261, 7046522, 10569783, 21139566]

約数ペア:

[(1, 21139566), (2, 10569783), (3, 7046522), (6, 3523261), (7, 3019938), (14, 1509969), (21, 1006646), (42, 503323), (47, 449778), (94, 224889), (141, 149926), (282, 74963), (329, 64254), (658, 32127), (987, 21418), (1974, 10709)]