21391112

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{140731}}^1$

素因数の和:140756

約数の個数: 16

約数和(自身を含む): 42219600

約数和(自身を除く): 20828488

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 140731, 281462, 562924, 1125848, 2673889, 5347778, 10695556, 21391112]

約数ペア:

[(1, 21391112), (2, 10695556), (4, 5347778), (8, 2673889), (19, 1125848), (38, 562924), (76, 281462), (152, 140731)]