21064276

素因数分解:

$2^2\times {\mathrm{61}}^1\times {\mathrm{131}}^1\times {\mathrm{659}}^1$

素因数の和:855

約数の個数: 24

約数和(自身を含む): 37810080

約数和(自身を除く): 16745804

約数列:

[1, 2, 4, 61, 122, 131, 244, 262, 524, 659, 1318, 2636, 7991, 15982, 31964, 40199, 80398, 86329, 160796, 172658, 345316, 5266069, 10532138, 21064276]

約数ペア:

[(1, 21064276), (2, 10532138), (4, 5266069), (61, 345316), (122, 172658), (131, 160796), (244, 86329), (262, 80398), (524, 40199), (659, 31964), (1318, 15982), (2636, 7991)]