81395560

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{1279}}^1$

素因数の和:1370

約数の個数: 64

約数和(自身を含む): 192614400

約数和(自身を除く): 111218840

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 43, 74, 86, 148, 172, 185, 215, 296, 344, 370, 430, 740, 860, 1279, 1480, 1591, 1720, 2558, 3182, 5116, 6364, 6395, 7955, 10232, 12728, 12790, 15910, 25580, 31820, 47323, 51160, 54997, 63640, 94646, 109994, 189292, 219988, 236615, 274985, 378584, 439976, 473230, 549970, 946460, 1099940, 1892920, 2034889, 2199880, 4069778, 8139556, 10174445, 16279112, 20348890, 40697780, 81395560]

約数ペア:

[(1, 81395560), (2, 40697780), (4, 20348890), (5, 16279112), (8, 10174445), (10, 8139556), (20, 4069778), (37, 2199880), (40, 2034889), (43, 1892920), (74, 1099940), (86, 946460), (148, 549970), (172, 473230), (185, 439976), (215, 378584), (296, 274985), (344, 236615), (370, 219988), (430, 189292), (740, 109994), (860, 94646), (1279, 63640), (1480, 54997), (1591, 51160), (1720, 47323), (2558, 31820), (3182, 25580), (5116, 15910), (6364, 12790), (6395, 12728), (7955, 10232)]