21057311

素因数分解:

${\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1\times {\mathrm{157}}^1$

素因数の和:394

約数の個数: 16

約数和(自身を含む): 23548320

約数和(自身を除く): 2491009

約数列:

[1, 11, 89, 137, 157, 979, 1507, 1727, 12193, 13973, 21509, 134123, 153703, 236599, 1914301, 21057311]

約数ペア:

[(1, 21057311), (11, 1914301), (89, 236599), (137, 153703), (157, 134123), (979, 21509), (1507, 13973), (1727, 12193)]