20787824

素因数分解:

$2^4\times {\mathrm{19}}^2\times {\mathrm{59}}^1\times {\mathrm{61}}^1$

素因数の和:166

約数の個数: 60

約数和(自身を含む): 43936920

約数和(自身を除く): 23149096

約数列:

[1, 2, 4, 8, 16, 19, 38, 59, 61, 76, 118, 122, 152, 236, 244, 304, 361, 472, 488, 722, 944, 976, 1121, 1159, 1444, 2242, 2318, 2888, 3599, 4484, 4636, 5776, 7198, 8968, 9272, 14396, 17936, 18544, 21299, 22021, 28792, 42598, 44042, 57584, 68381, 85196, 88084, 136762, 170392, 176168, 273524, 340784, 352336, 547048, 1094096, 1299239, 2598478, 5196956, 10393912, 20787824]

約数ペア:

[(1, 20787824), (2, 10393912), (4, 5196956), (8, 2598478), (16, 1299239), (19, 1094096), (38, 547048), (59, 352336), (61, 340784), (76, 273524), (118, 176168), (122, 170392), (152, 136762), (236, 88084), (244, 85196), (304, 68381), (361, 57584), (472, 44042), (488, 42598), (722, 28792), (944, 22021), (976, 21299), (1121, 18544), (1159, 17936), (1444, 14396), (2242, 9272), (2318, 8968), (2888, 7198), (3599, 5776), (4484, 4636)]