20809840

素因数分解:

$2^4\times 5^1\times {\mathrm{269}}^1\times {\mathrm{967}}^1$

素因数の和:1249

約数の個数: 40

約数和(自身を含む): 48612960

約数和(自身を除く): 27803120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 269, 538, 967, 1076, 1345, 1934, 2152, 2690, 3868, 4304, 4835, 5380, 7736, 9670, 10760, 15472, 19340, 21520, 38680, 77360, 260123, 520246, 1040492, 1300615, 2080984, 2601230, 4161968, 5202460, 10404920, 20809840]

約数ペア:

[(1, 20809840), (2, 10404920), (4, 5202460), (5, 4161968), (8, 2601230), (10, 2080984), (16, 1300615), (20, 1040492), (40, 520246), (80, 260123), (269, 77360), (538, 38680), (967, 21520), (1076, 19340), (1345, 15472), (1934, 10760), (2152, 9670), (2690, 7736), (3868, 5380), (4304, 4835)]