21209944

素因数分解:

$2^3\times 7^2\times {\mathrm{61}}^1\times {\mathrm{887}}^1$

素因数の和:968

約数の個数: 48

約数和(自身を含む): 47072880

約数和(自身を除く): 25862936

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 61, 98, 122, 196, 244, 392, 427, 488, 854, 887, 1708, 1774, 2989, 3416, 3548, 5978, 6209, 7096, 11956, 12418, 23912, 24836, 43463, 49672, 54107, 86926, 108214, 173852, 216428, 347704, 378749, 432856, 757498, 1514996, 2651243, 3029992, 5302486, 10604972, 21209944]

約数ペア:

[(1, 21209944), (2, 10604972), (4, 5302486), (7, 3029992), (8, 2651243), (14, 1514996), (28, 757498), (49, 432856), (56, 378749), (61, 347704), (98, 216428), (122, 173852), (196, 108214), (244, 86926), (392, 54107), (427, 49672), (488, 43463), (854, 24836), (887, 23912), (1708, 12418), (1774, 11956), (2989, 7096), (3416, 6209), (3548, 5978)]