21086561

素因数分解:

${\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{661}}^1$

素因数の和:776

約数の個数: 16

約数和(自身を含む): 23514240

約数和(自身を除く): 2427679

約数列:

[1, 19, 23, 73, 437, 661, 1387, 1679, 12559, 15203, 31901, 48253, 288857, 916807, 1109819, 21086561]

約数ペア:

[(1, 21086561), (19, 1109819), (23, 916807), (73, 288857), (437, 48253), (661, 31901), (1387, 15203), (1679, 12559)]