21230715

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{223}}^1\times {\mathrm{577}}^1$

素因数の和:819

約数の個数: 32

約数和(自身を含む): 37287936

約数和(自身を除く): 16057221

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 223, 577, 669, 1115, 1731, 2453, 2885, 3345, 6347, 7359, 8655, 12265, 19041, 31735, 36795, 95205, 128671, 386013, 643355, 1415381, 1930065, 4246143, 7076905, 21230715]

約数ペア:

[(1, 21230715), (3, 7076905), (5, 4246143), (11, 1930065), (15, 1415381), (33, 643355), (55, 386013), (165, 128671), (223, 95205), (577, 36795), (669, 31735), (1115, 19041), (1731, 12265), (2453, 8655), (2885, 7359), (3345, 6347)]