21285966

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{271}}^1$

素因数の和:361

約数の個数: 64

約数和(自身を含む): 49351680

約数和(自身を除く): 28065714

約数列:

[1, 2, 3, 6, 13, 19, 26, 38, 39, 53, 57, 78, 106, 114, 159, 247, 271, 318, 494, 542, 689, 741, 813, 1007, 1378, 1482, 1626, 2014, 2067, 3021, 3523, 4134, 5149, 6042, 7046, 10298, 10569, 13091, 14363, 15447, 21138, 26182, 28726, 30894, 39273, 43089, 66937, 78546, 86178, 133874, 186719, 200811, 272897, 373438, 401622, 545794, 560157, 818691, 1120314, 1637382, 3547661, 7095322, 10642983, 21285966]

約数ペア:

[(1, 21285966), (2, 10642983), (3, 7095322), (6, 3547661), (13, 1637382), (19, 1120314), (26, 818691), (38, 560157), (39, 545794), (53, 401622), (57, 373438), (78, 272897), (106, 200811), (114, 186719), (159, 133874), (247, 86178), (271, 78546), (318, 66937), (494, 43089), (542, 39273), (689, 30894), (741, 28726), (813, 26182), (1007, 21138), (1378, 15447), (1482, 14363), (1626, 13091), (2014, 10569), (2067, 10298), (3021, 7046), (3523, 6042), (4134, 5149)]