21069855

素因数分解:

$3^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{1609}}^1$

素因数の和:1720

約数の個数: 32

約数和(自身を含む): 37867200

約数和(自身を除く): 16797345

約数列:

[1, 3, 5, 9, 15, 27, 45, 97, 135, 291, 485, 873, 1455, 1609, 2619, 4365, 4827, 8045, 13095, 14481, 24135, 43443, 72405, 156073, 217215, 468219, 780365, 1404657, 2341095, 4213971, 7023285, 21069855]

約数ペア:

[(1, 21069855), (3, 7023285), (5, 4213971), (9, 2341095), (15, 1404657), (27, 780365), (45, 468219), (97, 217215), (135, 156073), (291, 72405), (485, 43443), (873, 24135), (1455, 14481), (1609, 13095), (2619, 8045), (4365, 4827)]