21990256

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{22531}}^1$

素因数の和:22600

約数の個数: 20

約数和(自身を含む): 43306504

約数和(自身を除く): 21316248

約数列:

[1, 2, 4, 8, 16, 61, 122, 244, 488, 976, 22531, 45062, 90124, 180248, 360496, 1374391, 2748782, 5497564, 10995128, 21990256]

約数ペア:

[(1, 21990256), (2, 10995128), (4, 5497564), (8, 2748782), (16, 1374391), (61, 360496), (122, 180248), (244, 90124), (488, 45062), (976, 22531)]