21815612

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{821}}^1$

素因数の和:918

約数の個数: 48

約数和(自身を含む): 47689152

約数和(自身を除く): 25873540

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 73, 91, 146, 182, 292, 364, 511, 821, 949, 1022, 1642, 1898, 2044, 3284, 3796, 5747, 6643, 10673, 11494, 13286, 21346, 22988, 26572, 42692, 59933, 74711, 119866, 149422, 239732, 298844, 419531, 779129, 839062, 1558258, 1678124, 3116516, 5453903, 10907806, 21815612]

約数ペア:

[(1, 21815612), (2, 10907806), (4, 5453903), (7, 3116516), (13, 1678124), (14, 1558258), (26, 839062), (28, 779129), (52, 419531), (73, 298844), (91, 239732), (146, 149422), (182, 119866), (292, 74711), (364, 59933), (511, 42692), (821, 26572), (949, 22988), (1022, 21346), (1642, 13286), (1898, 11494), (2044, 10673), (3284, 6643), (3796, 5747)]