409555120

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{1999}}^1$

素因数の和:2222

約数の個数: 80

約数和(自身を含む): 1031184000

約数和(自身を除く): 621628880

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 197, 208, 260, 394, 520, 788, 985, 1040, 1576, 1970, 1999, 2561, 3152, 3940, 3998, 5122, 7880, 7996, 9995, 10244, 12805, 15760, 15992, 19990, 20488, 25610, 25987, 31984, 39980, 40976, 51220, 51974, 79960, 102440, 103948, 129935, 159920, 204880, 207896, 259870, 393803, 415792, 519740, 787606, 1039480, 1575212, 1969015, 2078960, 3150424, 3938030, 5119439, 6300848, 7876060, 10238878, 15752120, 20477756, 25597195, 31504240, 40955512, 51194390, 81911024, 102388780, 204777560, 409555120]

約数ペア:

[(1, 409555120), (2, 204777560), (4, 102388780), (5, 81911024), (8, 51194390), (10, 40955512), (13, 31504240), (16, 25597195), (20, 20477756), (26, 15752120), (40, 10238878), (52, 7876060), (65, 6300848), (80, 5119439), (104, 3938030), (130, 3150424), (197, 2078960), (208, 1969015), (260, 1575212), (394, 1039480), (520, 787606), (788, 519740), (985, 415792), (1040, 393803), (1576, 259870), (1970, 207896), (1999, 204880), (2561, 159920), (3152, 129935), (3940, 103948), (3998, 102440), (5122, 79960), (7880, 51974), (7996, 51220), (9995, 40976), (10244, 39980), (12805, 31984), (15760, 25987), (15992, 25610), (19990, 20488)]