21216573

素因数分解:

$3^5\times 7^1\times {\mathrm{12473}}^1$

素因数の和:12495

約数の個数: 24

約数和(自身を含む): 36324288

約数和(自身を除く): 15107715

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 1701, 12473, 37419, 87311, 112257, 261933, 336771, 785799, 1010313, 2357397, 3030939, 7072191, 21216573]

約数ペア:

[(1, 21216573), (3, 7072191), (7, 3030939), (9, 2357397), (21, 1010313), (27, 785799), (63, 336771), (81, 261933), (189, 112257), (243, 87311), (567, 37419), (1701, 12473)]