21393554

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:171

約数の個数: 64

約数和(自身を含む): 41997312

約数和(自身を除く): 20603758

約数列:

[1, 2, 7, 13, 14, 26, 41, 47, 61, 82, 91, 94, 122, 182, 287, 329, 427, 533, 574, 611, 658, 793, 854, 1066, 1222, 1586, 1927, 2501, 2867, 3731, 3854, 4277, 5002, 5551, 5734, 7462, 8554, 11102, 13489, 17507, 20069, 25051, 26978, 32513, 35014, 37271, 40138, 50102, 65026, 74542, 117547, 175357, 227591, 235094, 260897, 350714, 455182, 521794, 822829, 1528111, 1645658, 3056222, 10696777, 21393554]

約数ペア:

[(1, 21393554), (2, 10696777), (7, 3056222), (13, 1645658), (14, 1528111), (26, 822829), (41, 521794), (47, 455182), (61, 350714), (82, 260897), (91, 235094), (94, 227591), (122, 175357), (182, 117547), (287, 74542), (329, 65026), (427, 50102), (533, 40138), (574, 37271), (611, 35014), (658, 32513), (793, 26978), (854, 25051), (1066, 20069), (1222, 17507), (1586, 13489), (1927, 11102), (2501, 8554), (2867, 7462), (3731, 5734), (3854, 5551), (4277, 5002)]