19992681

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{1637}}^1$

素因数の和:1725

約数の個数: 24

約数和(自身を含む): 30663360

約数和(自身を除く): 10670679

約数列:

[1, 3, 9, 23, 59, 69, 177, 207, 531, 1357, 1637, 4071, 4911, 12213, 14733, 37651, 96583, 112953, 289749, 338859, 869247, 2221409, 6664227, 19992681]

約数ペア:

[(1, 19992681), (3, 6664227), (9, 2221409), (23, 869247), (59, 338859), (69, 289749), (177, 112953), (207, 96583), (531, 37651), (1357, 14733), (1637, 12213), (4071, 4911)]