19810098201640

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1439}}^1\times {\mathrm{1747027}}^1$

素因数の和:1748674

約数の個数: 64

約数和(自身を含む): 44830136102400

約数和(自身を除く): 25020037900760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1439, 1576, 1970, 2878, 3940, 5756, 7195, 7880, 11512, 14390, 28780, 57560, 283483, 566966, 1133932, 1417415, 1747027, 2267864, 2834830, 3494054, 5669660, 6988108, 8735135, 11339320, 13976216, 17470270, 34940540, 69881080, 344164319, 688328638, 1376657276, 1720821595, 2513971853, 2753314552, 3441643190, 5027943706, 6883286380, 10055887412, 12569859265, 13766572760, 20111774824, 25139718530, 50279437060, 100558874120, 495252455041, 990504910082, 1981009820164, 2476262275205, 3962019640328, 4952524550410, 9905049100820, 19810098201640]

約数ペア:

[(1, 19810098201640), (2, 9905049100820), (4, 4952524550410), (5, 3962019640328), (8, 2476262275205), (10, 1981009820164), (20, 990504910082), (40, 495252455041), (197, 100558874120), (394, 50279437060), (788, 25139718530), (985, 20111774824), (1439, 13766572760), (1576, 12569859265), (1970, 10055887412), (2878, 6883286380), (3940, 5027943706), (5756, 3441643190), (7195, 2753314552), (7880, 2513971853), (11512, 1720821595), (14390, 1376657276), (28780, 688328638), (57560, 344164319), (283483, 69881080), (566966, 34940540), (1133932, 17470270), (1417415, 13976216), (1747027, 11339320), (2267864, 8735135), (2834830, 6988108), (3494054, 5669660)]