21065864

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{173}}^1\times {\mathrm{491}}^1$

素因数の和:701

約数の個数: 32

約数和(自身を含む): 41091840

約数和(自身を除く): 20025976

約数列:

[1, 2, 4, 8, 31, 62, 124, 173, 248, 346, 491, 692, 982, 1384, 1964, 3928, 5363, 10726, 15221, 21452, 30442, 42904, 60884, 84943, 121768, 169886, 339772, 679544, 2633233, 5266466, 10532932, 21065864]

約数ペア:

[(1, 21065864), (2, 10532932), (4, 5266466), (8, 2633233), (31, 679544), (62, 339772), (124, 169886), (173, 121768), (248, 84943), (346, 60884), (491, 42904), (692, 30442), (982, 21452), (1384, 15221), (1964, 10726), (3928, 5363)]