20798560

素因数分解:

$2^5\times 5^1\times {\mathrm{61}}^1\times {\mathrm{2131}}^1$

素因数の和:2207

約数の個数: 48

約数和(自身を含む): 49965552

約数和(自身を除く): 29166992

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 80, 122, 160, 244, 305, 488, 610, 976, 1220, 1952, 2131, 2440, 4262, 4880, 8524, 9760, 10655, 17048, 21310, 34096, 42620, 68192, 85240, 129991, 170480, 259982, 340960, 519964, 649955, 1039928, 1299910, 2079856, 2599820, 4159712, 5199640, 10399280, 20798560]

約数ペア:

[(1, 20798560), (2, 10399280), (4, 5199640), (5, 4159712), (8, 2599820), (10, 2079856), (16, 1299910), (20, 1039928), (32, 649955), (40, 519964), (61, 340960), (80, 259982), (122, 170480), (160, 129991), (244, 85240), (305, 68192), (488, 42620), (610, 34096), (976, 21310), (1220, 17048), (1952, 10655), (2131, 9760), (2440, 8524), (4262, 4880)]