21615573

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{19421}}^1$

素因数の和:19484

約数の個数: 16

約数和(自身を含む): 33561216

約数和(自身を除く): 11945643

約数列:

[1, 3, 7, 21, 53, 159, 371, 1113, 19421, 58263, 135947, 407841, 1029313, 3087939, 7205191, 21615573]

約数ペア:

[(1, 21615573), (3, 7205191), (7, 3087939), (21, 1029313), (53, 407841), (159, 135947), (371, 58263), (1113, 19421)]