21127988

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{241}}^1$

素因数の和:384

約数の個数: 48

約数和(自身を含む): 44233728

約数和(自身を除く): 23105740

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 101, 124, 202, 217, 241, 404, 434, 482, 707, 868, 964, 1414, 1687, 2828, 3131, 3374, 6262, 6748, 7471, 12524, 14942, 21917, 24341, 29884, 43834, 48682, 52297, 87668, 97364, 104594, 170387, 209188, 340774, 681548, 754571, 1509142, 3018284, 5281997, 10563994, 21127988]

約数ペア:

[(1, 21127988), (2, 10563994), (4, 5281997), (7, 3018284), (14, 1509142), (28, 754571), (31, 681548), (62, 340774), (101, 209188), (124, 170387), (202, 104594), (217, 97364), (241, 87668), (404, 52297), (434, 48682), (482, 43834), (707, 29884), (868, 24341), (964, 21917), (1414, 14942), (1687, 12524), (2828, 7471), (3131, 6748), (3374, 6262)]