21202784

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{811}}^1$

素因数の和:883

約数の個数: 48

約数和(自身を含む): 45017280

約数和(自身を除く): 23814496

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 43, 76, 86, 152, 172, 304, 344, 608, 688, 811, 817, 1376, 1622, 1634, 3244, 3268, 6488, 6536, 12976, 13072, 15409, 25952, 26144, 30818, 34873, 61636, 69746, 123272, 139492, 246544, 278984, 493088, 557968, 662587, 1115936, 1325174, 2650348, 5300696, 10601392, 21202784]

約数ペア:

[(1, 21202784), (2, 10601392), (4, 5300696), (8, 2650348), (16, 1325174), (19, 1115936), (32, 662587), (38, 557968), (43, 493088), (76, 278984), (86, 246544), (152, 139492), (172, 123272), (304, 69746), (344, 61636), (608, 34873), (688, 30818), (811, 26144), (817, 25952), (1376, 15409), (1622, 13072), (1634, 12976), (3244, 6536), (3268, 6488)]