21511196

素因数分解:

$2^2\times 7^2\times {\mathrm{109751}}^1$

素因数の和:109769

約数の個数: 18

約数和(自身を含む): 43791048

約数和(自身を除く): 22279852

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 109751, 219502, 439004, 768257, 1536514, 3073028, 5377799, 10755598, 21511196]

約数ペア:

[(1, 21511196), (2, 10755598), (4, 5377799), (7, 3073028), (14, 1536514), (28, 768257), (49, 439004), (98, 219502), (196, 109751)]