20193979

素因数分解:

${\mathrm{13}}^2\times {\mathrm{19}}^2\times {\mathrm{331}}^1$

素因数の和:395

約数の個数: 18

約数和(自身を含む): 23148036

約数和(自身を除く): 2954057

約数列:

[1, 13, 19, 169, 247, 331, 361, 3211, 4303, 4693, 6289, 55939, 61009, 81757, 119491, 1062841, 1553383, 20193979]

約数ペア:

[(1, 20193979), (13, 1553383), (19, 1062841), (169, 119491), (247, 81757), (331, 61009), (361, 55939), (3211, 6289), (4303, 4693)]