642758

素因数分解:

$2^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1$

素因数の和:271

約数の個数: 16

約数和(自身を含む): 1023840

約数和(自身を除く): 381082

約数列:

[1, 2, 23, 46, 89, 157, 178, 314, 2047, 3611, 4094, 7222, 13973, 27946, 321379, 642758]

約数ペア:

[(1, 642758), (2, 321379), (23, 27946), (46, 13973), (89, 7222), (157, 4094), (178, 3611), (314, 2047)]