21094780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{1693}}^1$

素因数の和:1798

約数の個数: 48

約数和(自身を含む): 51226560

約数和(自身を除く): 30131780

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 89, 140, 178, 356, 445, 623, 890, 1246, 1693, 1780, 2492, 3115, 3386, 6230, 6772, 8465, 11851, 12460, 16930, 23702, 33860, 47404, 59255, 118510, 150677, 237020, 301354, 602708, 753385, 1054739, 1506770, 2109478, 3013540, 4218956, 5273695, 10547390, 21094780]

約数ペア:

[(1, 21094780), (2, 10547390), (4, 5273695), (5, 4218956), (7, 3013540), (10, 2109478), (14, 1506770), (20, 1054739), (28, 753385), (35, 602708), (70, 301354), (89, 237020), (140, 150677), (178, 118510), (356, 59255), (445, 47404), (623, 33860), (890, 23702), (1246, 16930), (1693, 12460), (1780, 11851), (2492, 8465), (3115, 6772), (3386, 6230)]