21215292

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{139}}^1$

素因数の和:255

約数の個数: 96

約数和(自身を含む): 60211200

約数和(自身を除く): 38995908

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 23, 28, 42, 46, 69, 79, 84, 92, 138, 139, 158, 161, 237, 276, 278, 316, 322, 417, 474, 483, 553, 556, 644, 834, 948, 966, 973, 1106, 1659, 1668, 1817, 1932, 1946, 2212, 2919, 3197, 3318, 3634, 3892, 5451, 5838, 6394, 6636, 7268, 9591, 10902, 10981, 11676, 12719, 12788, 19182, 21804, 21962, 22379, 25438, 32943, 38157, 38364, 43924, 44758, 50876, 65886, 67137, 76314, 76867, 89516, 131772, 134274, 152628, 153734, 230601, 252563, 268548, 307468, 461202, 505126, 757689, 922404, 1010252, 1515378, 1767941, 3030756, 3535882, 5303823, 7071764, 10607646, 21215292]

約数ペア:

[(1, 21215292), (2, 10607646), (3, 7071764), (4, 5303823), (6, 3535882), (7, 3030756), (12, 1767941), (14, 1515378), (21, 1010252), (23, 922404), (28, 757689), (42, 505126), (46, 461202), (69, 307468), (79, 268548), (84, 252563), (92, 230601), (138, 153734), (139, 152628), (158, 134274), (161, 131772), (237, 89516), (276, 76867), (278, 76314), (316, 67137), (322, 65886), (417, 50876), (474, 44758), (483, 43924), (553, 38364), (556, 38157), (644, 32943), (834, 25438), (948, 22379), (966, 21962), (973, 21804), (1106, 19182), (1659, 12788), (1668, 12719), (1817, 11676), (1932, 10981), (1946, 10902), (2212, 9591), (2919, 7268), (3197, 6636), (3318, 6394), (3634, 5838), (3892, 5451)]