21987896

素因数分解:

$2^3\times 7^1\times {\mathrm{431}}^1\times {\mathrm{911}}^1$

素因数の和:1355

約数の個数: 32

約数和(自身を含む): 47278080

約数和(自身を除く): 25290184

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 431, 862, 911, 1724, 1822, 3017, 3448, 3644, 6034, 6377, 7288, 12068, 12754, 24136, 25508, 51016, 392641, 785282, 1570564, 2748487, 3141128, 5496974, 10993948, 21987896]

約数ペア:

[(1, 21987896), (2, 10993948), (4, 5496974), (7, 3141128), (8, 2748487), (14, 1570564), (28, 785282), (56, 392641), (431, 51016), (862, 25508), (911, 24136), (1724, 12754), (1822, 12068), (3017, 7288), (3448, 6377), (3644, 6034)]