21530888

素因数分解:

$2^3\times {\mathrm{47}}^1\times {\mathrm{173}}^1\times {\mathrm{331}}^1$

素因数の和:557

約数の個数: 32

約数和(自身を含む): 41592960

約数和(自身を除く): 20062072

約数列:

[1, 2, 4, 8, 47, 94, 173, 188, 331, 346, 376, 662, 692, 1324, 1384, 2648, 8131, 15557, 16262, 31114, 32524, 57263, 62228, 65048, 114526, 124456, 229052, 458104, 2691361, 5382722, 10765444, 21530888]

約数ペア:

[(1, 21530888), (2, 10765444), (4, 5382722), (8, 2691361), (47, 458104), (94, 229052), (173, 124456), (188, 114526), (331, 65048), (346, 62228), (376, 57263), (662, 32524), (692, 31114), (1324, 16262), (1384, 15557), (2648, 8131)]