21986397

素因数分解:

$3^5\times {\mathrm{173}}^1\times {\mathrm{523}}^1$

素因数の和:711

約数の個数: 24

約数和(自身を含む): 33188064

約数和(自身を除く): 11201667

約数列:

[1, 3, 9, 27, 81, 173, 243, 519, 523, 1557, 1569, 4671, 4707, 14013, 14121, 42039, 42363, 90479, 127089, 271437, 814311, 2442933, 7328799, 21986397]

約数ペア:

[(1, 21986397), (3, 7328799), (9, 2442933), (27, 814311), (81, 271437), (173, 127089), (243, 90479), (519, 42363), (523, 42039), (1557, 14121), (1569, 14013), (4671, 4707)]