21028072

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{149}}^1$

素因数の和:250

約数の個数: 64

約数和(自身を含む): 45360000

約数和(自身を除く): 24331928

約数列:

[1, 2, 4, 8, 13, 23, 26, 46, 52, 59, 92, 104, 118, 149, 184, 236, 298, 299, 472, 596, 598, 767, 1192, 1196, 1357, 1534, 1937, 2392, 2714, 3068, 3427, 3874, 5428, 6136, 6854, 7748, 8791, 10856, 13708, 15496, 17582, 17641, 27416, 35164, 35282, 44551, 70328, 70564, 89102, 114283, 141128, 178204, 202193, 228566, 356408, 404386, 457132, 808772, 914264, 1617544, 2628509, 5257018, 10514036, 21028072]

約数ペア:

[(1, 21028072), (2, 10514036), (4, 5257018), (8, 2628509), (13, 1617544), (23, 914264), (26, 808772), (46, 457132), (52, 404386), (59, 356408), (92, 228566), (104, 202193), (118, 178204), (149, 141128), (184, 114283), (236, 89102), (298, 70564), (299, 70328), (472, 44551), (596, 35282), (598, 35164), (767, 27416), (1192, 17641), (1196, 17582), (1357, 15496), (1534, 13708), (1937, 10856), (2392, 8791), (2714, 7748), (3068, 6854), (3427, 6136), (3874, 5428)]