20716878

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1997}}^1$

素因数の和:2041

約数の個数: 64

約数和(自身を含む): 53706240

約数和(自身を除く): 32989362

約数列:

[1, 2, 3, 6, 7, 13, 14, 19, 21, 26, 38, 39, 42, 57, 78, 91, 114, 133, 182, 247, 266, 273, 399, 494, 546, 741, 798, 1482, 1729, 1997, 3458, 3994, 5187, 5991, 10374, 11982, 13979, 25961, 27958, 37943, 41937, 51922, 75886, 77883, 83874, 113829, 155766, 181727, 227658, 265601, 363454, 493259, 531202, 545181, 796803, 986518, 1090362, 1479777, 1593606, 2959554, 3452813, 6905626, 10358439, 20716878]

約数ペア:

[(1, 20716878), (2, 10358439), (3, 6905626), (6, 3452813), (7, 2959554), (13, 1593606), (14, 1479777), (19, 1090362), (21, 986518), (26, 796803), (38, 545181), (39, 531202), (42, 493259), (57, 363454), (78, 265601), (91, 227658), (114, 181727), (133, 155766), (182, 113829), (247, 83874), (266, 77883), (273, 75886), (399, 51922), (494, 41937), (546, 37943), (741, 27958), (798, 25961), (1482, 13979), (1729, 11982), (1997, 10374), (3458, 5991), (3994, 5187)]