21128172

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{167}}^1\times {\mathrm{811}}^1$

素因数の和:998

約数の個数: 48

約数和(自身を含む): 53475072

約数和(自身を除く): 32346900

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156, 167, 334, 501, 668, 811, 1002, 1622, 2004, 2171, 2433, 3244, 4342, 4866, 6513, 8684, 9732, 10543, 13026, 21086, 26052, 31629, 42172, 63258, 126516, 135437, 270874, 406311, 541748, 812622, 1625244, 1760681, 3521362, 5282043, 7042724, 10564086, 21128172]

約数ペア:

[(1, 21128172), (2, 10564086), (3, 7042724), (4, 5282043), (6, 3521362), (12, 1760681), (13, 1625244), (26, 812622), (39, 541748), (52, 406311), (78, 270874), (156, 135437), (167, 126516), (334, 63258), (501, 42172), (668, 31629), (811, 26052), (1002, 21086), (1622, 13026), (2004, 10543), (2171, 9732), (2433, 8684), (3244, 6513), (4342, 4866)]