21287826

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{199}}^1\times {\mathrm{283}}^1$

素因数の和:500

約数の個数: 64

約数和(自身を含む): 54528000

約数和(自身を除く): 33240174

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 126, 189, 199, 283, 378, 398, 566, 597, 849, 1194, 1393, 1698, 1791, 1981, 2547, 2786, 3582, 3962, 4179, 5094, 5373, 5943, 7641, 8358, 10746, 11886, 12537, 15282, 17829, 25074, 35658, 37611, 53487, 56317, 75222, 106974, 112634, 168951, 337902, 394219, 506853, 788438, 1013706, 1182657, 1520559, 2365314, 3041118, 3547971, 7095942, 10643913, 21287826]

約数ペア:

[(1, 21287826), (2, 10643913), (3, 7095942), (6, 3547971), (7, 3041118), (9, 2365314), (14, 1520559), (18, 1182657), (21, 1013706), (27, 788438), (42, 506853), (54, 394219), (63, 337902), (126, 168951), (189, 112634), (199, 106974), (283, 75222), (378, 56317), (398, 53487), (566, 37611), (597, 35658), (849, 25074), (1194, 17829), (1393, 15282), (1698, 12537), (1791, 11886), (1981, 10746), (2547, 8358), (2786, 7641), (3582, 5943), (3962, 5373), (4179, 5094)]