21246988

素因数分解:

$2^2\times 7^2\times {\mathrm{43}}^1\times {\mathrm{2521}}^1$

素因数の和:2582

約数の個数: 36

約数和(自身を含む): 44276232

約数和(自身を除く): 23029244

約数列:

[1, 2, 4, 7, 14, 28, 43, 49, 86, 98, 172, 196, 301, 602, 1204, 2107, 2521, 4214, 5042, 8428, 10084, 17647, 35294, 70588, 108403, 123529, 216806, 247058, 433612, 494116, 758821, 1517642, 3035284, 5311747, 10623494, 21246988]

約数ペア:

[(1, 21246988), (2, 10623494), (4, 5311747), (7, 3035284), (14, 1517642), (28, 758821), (43, 494116), (49, 433612), (86, 247058), (98, 216806), (172, 123529), (196, 108403), (301, 70588), (602, 35294), (1204, 17647), (2107, 10084), (2521, 8428), (4214, 5042)]