21015178

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{211}}^1\times {\mathrm{2621}}^1$

素因数の和:2853

約数の個数: 16

約数和(自身を含む): 33351840

約数和(自身を除く): 12336662

約数列:

[1, 2, 19, 38, 211, 422, 2621, 4009, 5242, 8018, 49799, 99598, 553031, 1106062, 10507589, 21015178]

約数ペア:

[(1, 21015178), (2, 10507589), (19, 1106062), (38, 553031), (211, 99598), (422, 49799), (2621, 8018), (4009, 5242)]