20721735

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{20021}}^1$

素因数の和:20055

約数の個数: 24

約数和(自身を含む): 37481184

約数和(自身を除く): 16759449

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 20021, 60063, 100105, 180189, 300315, 460483, 900945, 1381449, 2302415, 4144347, 6907245, 20721735]

約数ペア:

[(1, 20721735), (3, 6907245), (5, 4144347), (9, 2302415), (15, 1381449), (23, 900945), (45, 460483), (69, 300315), (115, 180189), (207, 100105), (345, 60063), (1035, 20021)]