21431228

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^2\times {\mathrm{647}}^1$

素因数の和:691

約数の個数: 54

約数和(自身を含む): 47315016

約数和(自身を除く): 25883788

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 49, 52, 91, 98, 169, 182, 196, 338, 364, 637, 647, 676, 1183, 1274, 1294, 2366, 2548, 2588, 4529, 4732, 8281, 8411, 9058, 16562, 16822, 18116, 31703, 33124, 33644, 58877, 63406, 109343, 117754, 126812, 218686, 235508, 412139, 437372, 765401, 824278, 1530802, 1648556, 3061604, 5357807, 10715614, 21431228]

約数ペア:

[(1, 21431228), (2, 10715614), (4, 5357807), (7, 3061604), (13, 1648556), (14, 1530802), (26, 824278), (28, 765401), (49, 437372), (52, 412139), (91, 235508), (98, 218686), (169, 126812), (182, 117754), (196, 109343), (338, 63406), (364, 58877), (637, 33644), (647, 33124), (676, 31703), (1183, 18116), (1274, 16822), (1294, 16562), (2366, 9058), (2548, 8411), (2588, 8281), (4529, 4732)]