21124971

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{239}}^1$

素因数の和:336

約数の個数: 48

約数和(自身を含む): 37140480

約数和(自身を除く): 16015509

約数列:

[1, 3, 7, 9, 21, 23, 61, 63, 69, 161, 183, 207, 239, 427, 483, 549, 717, 1281, 1403, 1449, 1673, 2151, 3843, 4209, 5019, 5497, 9821, 12627, 14579, 15057, 16491, 29463, 38479, 43737, 49473, 88389, 102053, 115437, 131211, 306159, 335317, 346311, 918477, 1005951, 2347219, 3017853, 7041657, 21124971]

約数ペア:

[(1, 21124971), (3, 7041657), (7, 3017853), (9, 2347219), (21, 1005951), (23, 918477), (61, 346311), (63, 335317), (69, 306159), (161, 131211), (183, 115437), (207, 102053), (239, 88389), (427, 49473), (483, 43737), (549, 38479), (717, 29463), (1281, 16491), (1403, 15057), (1449, 14579), (1673, 12627), (2151, 9821), (3843, 5497), (4209, 5019)]