21189780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{117721}}^1$

素因数の和:117736

約数の個数: 36

約数和(自身を含む): 64276212

約数和(自身を除く): 43086432

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 117721, 235442, 353163, 470884, 588605, 706326, 1059489, 1177210, 1412652, 1765815, 2118978, 2354420, 3531630, 4237956, 5297445, 7063260, 10594890, 21189780]

約数ペア:

[(1, 21189780), (2, 10594890), (3, 7063260), (4, 5297445), (5, 4237956), (6, 3531630), (9, 2354420), (10, 2118978), (12, 1765815), (15, 1412652), (18, 1177210), (20, 1059489), (30, 706326), (36, 588605), (45, 470884), (60, 353163), (90, 235442), (180, 117721)]