21238172

素因数分解:

$2^2\times {\mathrm{47}}^1\times {\mathrm{173}}^1\times {\mathrm{653}}^1$

素因数の和:877

約数の個数: 24

約数和(自身を含む): 38235456

約数和(自身を除く): 16997284

約数列:

[1, 2, 4, 47, 94, 173, 188, 346, 653, 692, 1306, 2612, 8131, 16262, 30691, 32524, 61382, 112969, 122764, 225938, 451876, 5309543, 10619086, 21238172]

約数ペア:

[(1, 21238172), (2, 10619086), (4, 5309543), (47, 451876), (94, 225938), (173, 122764), (188, 112969), (346, 61382), (653, 32524), (692, 30691), (1306, 16262), (2612, 8131)]