18841991

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{3163}}^1$

素因数の和:3230

約数の個数: 16

約数和(自身を含む): 23084544

約数和(自身を除く): 4242553

約数列:

[1, 7, 23, 37, 161, 259, 851, 3163, 5957, 22141, 72749, 117031, 509243, 819217, 2691713, 18841991]

約数ペア:

[(1, 18841991), (7, 2691713), (23, 819217), (37, 509243), (161, 117031), (259, 72749), (851, 22141), (3163, 5957)]