21078993

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{227}}^1\times {\mathrm{2381}}^1$

素因数の和:2624

約数の個数: 16

約数和(自身を含む): 30413376

約数和(自身を除く): 9334383

約数列:

[1, 3, 13, 39, 227, 681, 2381, 2951, 7143, 8853, 30953, 92859, 540487, 1621461, 7026331, 21078993]

約数ペア:

[(1, 21078993), (3, 7026331), (13, 1621461), (39, 540487), (227, 92859), (681, 30953), (2381, 8853), (2951, 7143)]