21138642

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{127}}^1\times {\mathrm{1321}}^1$

素因数の和:1463

約数の個数: 48

約数和(自身を含む): 52795392

約数和(自身を除く): 31656750

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 127, 254, 381, 762, 889, 1143, 1321, 1778, 2286, 2642, 2667, 3963, 5334, 7926, 8001, 9247, 11889, 16002, 18494, 23778, 27741, 55482, 83223, 166446, 167767, 335534, 503301, 1006602, 1174369, 1509903, 2348738, 3019806, 3523107, 7046214, 10569321, 21138642]

約数ペア:

[(1, 21138642), (2, 10569321), (3, 7046214), (6, 3523107), (7, 3019806), (9, 2348738), (14, 1509903), (18, 1174369), (21, 1006602), (42, 503301), (63, 335534), (126, 167767), (127, 166446), (254, 83223), (381, 55482), (762, 27741), (889, 23778), (1143, 18494), (1321, 16002), (1778, 11889), (2286, 9247), (2642, 8001), (2667, 7926), (3963, 5334)]