19978084

素因数分解:

$2^2\times 7^2\times {\mathrm{101929}}^1$

素因数の和:101947

約数の個数: 18

約数和(自身を含む): 40670070

約数和(自身を除く): 20691986

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 101929, 203858, 407716, 713503, 1427006, 2854012, 4994521, 9989042, 19978084]

約数ペア:

[(1, 19978084), (2, 9989042), (4, 4994521), (7, 2854012), (14, 1427006), (28, 713503), (49, 407716), (98, 203858), (196, 101929)]