21443660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{1721}}^1$

素因数の和:1826

約数の個数: 48

約数和(自身を含む): 52073280

約数和(自身を除く): 30629620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 89, 140, 178, 356, 445, 623, 890, 1246, 1721, 1780, 2492, 3115, 3442, 6230, 6884, 8605, 12047, 12460, 17210, 24094, 34420, 48188, 60235, 120470, 153169, 240940, 306338, 612676, 765845, 1072183, 1531690, 2144366, 3063380, 4288732, 5360915, 10721830, 21443660]

約数ペア:

[(1, 21443660), (2, 10721830), (4, 5360915), (5, 4288732), (7, 3063380), (10, 2144366), (14, 1531690), (20, 1072183), (28, 765845), (35, 612676), (70, 306338), (89, 240940), (140, 153169), (178, 120470), (356, 60235), (445, 48188), (623, 34420), (890, 24094), (1246, 17210), (1721, 12460), (1780, 12047), (2492, 8605), (3115, 6884), (3442, 6230)]