21388186

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{9227}}^1$

素因数の和:9309

約数の個数: 16

約数和(自身を含む): 34328160

約数和(自身を除く): 12939974

約数列:

[1, 2, 19, 38, 61, 122, 1159, 2318, 9227, 18454, 175313, 350626, 562847, 1125694, 10694093, 21388186]

約数ペア:

[(1, 21388186), (2, 10694093), (19, 1125694), (38, 562847), (61, 350626), (122, 175313), (1159, 18454), (2318, 9227)]