21821768

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{87991}}^1$

素因数の和:88028

約数の個数: 16

約数和(自身を含む): 42236160

約数和(自身を除く): 20414392

約数列:

[1, 2, 4, 8, 31, 62, 124, 248, 87991, 175982, 351964, 703928, 2727721, 5455442, 10910884, 21821768]

約数ペア:

[(1, 21821768), (2, 10910884), (4, 5455442), (8, 2727721), (31, 703928), (62, 351964), (124, 175982), (248, 87991)]