399722

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{157}}^1$

素因数の和:245

約数の個数: 16

約数和(自身を含む): 644640

約数和(自身を除く): 244918

約数列:

[1, 2, 19, 38, 67, 134, 157, 314, 1273, 2546, 2983, 5966, 10519, 21038, 199861, 399722]

約数ペア:

[(1, 399722), (2, 199861), (19, 21038), (38, 10519), (67, 5966), (134, 2983), (157, 2546), (314, 1273)]