408778520

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{149}}^1\times {\mathrm{641}}^1$

素因数の和:908

約数の個数: 64

約数和(自身を含む): 936036000

約数和(自身を除く): 527257480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 149, 214, 298, 428, 535, 596, 641, 745, 856, 1070, 1192, 1282, 1490, 2140, 2564, 2980, 3205, 4280, 5128, 5960, 6410, 12820, 15943, 25640, 31886, 63772, 68587, 79715, 95509, 127544, 137174, 159430, 191018, 274348, 318860, 342935, 382036, 477545, 548696, 637720, 685870, 764072, 955090, 1371740, 1910180, 2743480, 3820360, 10219463, 20438926, 40877852, 51097315, 81755704, 102194630, 204389260, 408778520]

約数ペア:

[(1, 408778520), (2, 204389260), (4, 102194630), (5, 81755704), (8, 51097315), (10, 40877852), (20, 20438926), (40, 10219463), (107, 3820360), (149, 2743480), (214, 1910180), (298, 1371740), (428, 955090), (535, 764072), (596, 685870), (641, 637720), (745, 548696), (856, 477545), (1070, 382036), (1192, 342935), (1282, 318860), (1490, 274348), (2140, 191018), (2564, 159430), (2980, 137174), (3205, 127544), (4280, 95509), (5128, 79715), (5960, 68587), (6410, 63772), (12820, 31886), (15943, 25640)]