19997918

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{641}}^1\times {\mathrm{821}}^1$

素因数の和:1483

約数の個数: 16

約数和(自身を含む): 31663440

約数和(自身を除く): 11665522

約数列:

[1, 2, 19, 38, 641, 821, 1282, 1642, 12179, 15599, 24358, 31198, 526261, 1052522, 9998959, 19997918]

約数ペア:

[(1, 19997918), (2, 9998959), (19, 1052522), (38, 526261), (641, 31198), (821, 24358), (1282, 15599), (1642, 12179)]