21912163

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{839}}^1$

素因数の和:907

約数の個数: 24

約数和(自身を含む): 28153440

約数和(自身を除く): 6241277

約数列:

[1, 7, 13, 41, 49, 91, 287, 533, 637, 839, 2009, 3731, 5873, 10907, 26117, 34399, 41111, 76349, 240793, 447187, 534443, 1685551, 3130309, 21912163]

約数ペア:

[(1, 21912163), (7, 3130309), (13, 1685551), (41, 534443), (49, 447187), (91, 240793), (287, 76349), (533, 41111), (637, 34399), (839, 26117), (2009, 10907), (3731, 5873)]