21191308

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{5261}}^1$

素因数の和:5337

約数の個数: 24

約数和(自身を含む): 39780720

約数和(自身を除く): 18589412

約数列:

[1, 2, 4, 19, 38, 53, 76, 106, 212, 1007, 2014, 4028, 5261, 10522, 21044, 99959, 199918, 278833, 399836, 557666, 1115332, 5297827, 10595654, 21191308]

約数ペア:

[(1, 21191308), (2, 10595654), (4, 5297827), (19, 1115332), (38, 557666), (53, 399836), (76, 278833), (106, 199918), (212, 99959), (1007, 21044), (2014, 10522), (4028, 5261)]