21167800

素因数分解:

$2^3\times 5^2\times {\mathrm{109}}^1\times {\mathrm{971}}^1$

素因数の和:1096

約数の個数: 48

約数和(自身を含む): 49717800

約数和(自身を除く): 28550000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 109, 200, 218, 436, 545, 872, 971, 1090, 1942, 2180, 2725, 3884, 4360, 4855, 5450, 7768, 9710, 10900, 19420, 21800, 24275, 38840, 48550, 97100, 105839, 194200, 211678, 423356, 529195, 846712, 1058390, 2116780, 2645975, 4233560, 5291950, 10583900, 21167800]

約数ペア:

[(1, 21167800), (2, 10583900), (4, 5291950), (5, 4233560), (8, 2645975), (10, 2116780), (20, 1058390), (25, 846712), (40, 529195), (50, 423356), (100, 211678), (109, 194200), (200, 105839), (218, 97100), (436, 48550), (545, 38840), (872, 24275), (971, 21800), (1090, 19420), (1942, 10900), (2180, 9710), (2725, 7768), (3884, 5450), (4360, 4855)]