21319998

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{127}}^1\times {\mathrm{571}}^1$

素因数の和:717

約数の個数: 48

約数和(自身を含む): 50079744

約数和(自身を除く): 28759746

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 127, 147, 254, 294, 381, 571, 762, 889, 1142, 1713, 1778, 2667, 3426, 3997, 5334, 6223, 7994, 11991, 12446, 18669, 23982, 27979, 37338, 55958, 72517, 83937, 145034, 167874, 217551, 435102, 507619, 1015238, 1522857, 3045714, 3553333, 7106666, 10659999, 21319998]

約数ペア:

[(1, 21319998), (2, 10659999), (3, 7106666), (6, 3553333), (7, 3045714), (14, 1522857), (21, 1015238), (42, 507619), (49, 435102), (98, 217551), (127, 167874), (147, 145034), (254, 83937), (294, 72517), (381, 55958), (571, 37338), (762, 27979), (889, 23982), (1142, 18669), (1713, 12446), (1778, 11991), (2667, 7994), (3426, 6223), (3997, 5334)]