21259924

素因数分解:

$2^2\times 7^2\times {\mathrm{31}}^1\times {\mathrm{3499}}^1$

素因数の和:3548

約数の個数: 36

約数和(自身を含む): 44688000

約数和(自身を除く): 23428076

約数列:

[1, 2, 4, 7, 14, 28, 31, 49, 62, 98, 124, 196, 217, 434, 868, 1519, 3038, 3499, 6076, 6998, 13996, 24493, 48986, 97972, 108469, 171451, 216938, 342902, 433876, 685804, 759283, 1518566, 3037132, 5314981, 10629962, 21259924]

約数ペア:

[(1, 21259924), (2, 10629962), (4, 5314981), (7, 3037132), (14, 1518566), (28, 759283), (31, 685804), (49, 433876), (62, 342902), (98, 216938), (124, 171451), (196, 108469), (217, 97972), (434, 48986), (868, 24493), (1519, 13996), (3038, 6998), (3499, 6076)]