21291244

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{331}}^1\times {\mathrm{1237}}^1$

素因数の和:1585

約数の個数: 24

約数和(自身を含む): 40279568

約数和(自身を除く): 18988324

約数列:

[1, 2, 4, 13, 26, 52, 331, 662, 1237, 1324, 2474, 4303, 4948, 8606, 16081, 17212, 32162, 64324, 409447, 818894, 1637788, 5322811, 10645622, 21291244]

約数ペア:

[(1, 21291244), (2, 10645622), (4, 5322811), (13, 1637788), (26, 818894), (52, 409447), (331, 64324), (662, 32162), (1237, 17212), (1324, 16081), (2474, 8606), (4303, 4948)]