21217860

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{117877}}^1$

素因数の和:117892

約数の個数: 36

約数和(自身を含む): 64361388

約数和(自身を除く): 43143528

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 117877, 235754, 353631, 471508, 589385, 707262, 1060893, 1178770, 1414524, 1768155, 2121786, 2357540, 3536310, 4243572, 5304465, 7072620, 10608930, 21217860]

約数ペア:

[(1, 21217860), (2, 10608930), (3, 7072620), (4, 5304465), (5, 4243572), (6, 3536310), (9, 2357540), (10, 2121786), (12, 1768155), (15, 1414524), (18, 1178770), (20, 1060893), (30, 707262), (36, 589385), (45, 471508), (60, 353631), (90, 235754), (180, 117877)]