21087645219

素因数分解:

$3^6\times {\mathrm{173}}^1\times {\mathrm{271}}^1\times {\mathrm{617}}^1$

素因数の和:1079

約数の個数: 56

約数和(自身を含む): 31968833472

約数和(自身を除く): 10881188253

約数列:

[1, 3, 9, 27, 81, 173, 243, 271, 519, 617, 729, 813, 1557, 1851, 2439, 4671, 5553, 7317, 14013, 16659, 21951, 42039, 46883, 49977, 65853, 106741, 126117, 140649, 149931, 167207, 197559, 320223, 421947, 449793, 501621, 960669, 1265841, 1504863, 2882007, 3797523, 4514589, 8646021, 11392569, 13543767, 25938063, 28926811, 34177707, 40631301, 77814189, 86780433, 121893903, 260341299, 781023897, 2343071691, 7029215073, 21087645219]

約数ペア:

[(1, 21087645219), (3, 7029215073), (9, 2343071691), (27, 781023897), (81, 260341299), (173, 121893903), (243, 86780433), (271, 77814189), (519, 40631301), (617, 34177707), (729, 28926811), (813, 25938063), (1557, 13543767), (1851, 11392569), (2439, 8646021), (4671, 4514589), (5553, 3797523), (7317, 2882007), (14013, 1504863), (16659, 1265841), (21951, 960669), (42039, 501621), (46883, 449793), (49977, 421947), (65853, 320223), (106741, 197559), (126117, 167207), (140649, 149931)]