21261080

素因数分解:

$2^3\times 5^1\times {\mathrm{349}}^1\times {\mathrm{1523}}^1$

素因数の和:1883

約数の個数: 32

約数和(自身を含む): 48006000

約数和(自身を除く): 26744920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 349, 698, 1396, 1523, 1745, 2792, 3046, 3490, 6092, 6980, 7615, 12184, 13960, 15230, 30460, 60920, 531527, 1063054, 2126108, 2657635, 4252216, 5315270, 10630540, 21261080]

約数ペア:

[(1, 21261080), (2, 10630540), (4, 5315270), (5, 4252216), (8, 2657635), (10, 2126108), (20, 1063054), (40, 531527), (349, 60920), (698, 30460), (1396, 15230), (1523, 13960), (1745, 12184), (2792, 7615), (3046, 6980), (3490, 6092)]