21393515

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29921}}^1$

素因数の和:29950

約数の個数: 16

約数和(自身を含む): 30161376

約数和(自身を除く): 8767861

約数列:

[1, 5, 11, 13, 55, 65, 143, 715, 29921, 149605, 329131, 388973, 1645655, 1944865, 4278703, 21393515]

約数ペア:

[(1, 21393515), (5, 4278703), (11, 1944865), (13, 1645655), (55, 388973), (65, 329131), (143, 149605), (715, 29921)]