20391717

素因数分解:

$3^1\times {\mathrm{79}}^1\times {\mathrm{139}}^1\times {\mathrm{619}}^1$

素因数の和:840

約数の個数: 16

約数和(自身を含む): 27776000

約数和(自身を除く): 7384283

約数列:

[1, 3, 79, 139, 237, 417, 619, 1857, 10981, 32943, 48901, 86041, 146703, 258123, 6797239, 20391717]

約数ペア:

[(1, 20391717), (3, 6797239), (79, 258123), (139, 146703), (237, 86041), (417, 48901), (619, 32943), (1857, 10981)]