21310913

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^3\times {\mathrm{239}}^1$

素因数の和:309

約数の個数: 16

約数和(自身を含む): 24326400

約数和(自身を除く): 3015487

約数列:

[1, 13, 19, 239, 247, 361, 3107, 4541, 4693, 6859, 59033, 86279, 89167, 1121627, 1639301, 21310913]

約数ペア:

[(1, 21310913), (13, 1639301), (19, 1121627), (239, 89167), (247, 86279), (361, 59033), (3107, 6859), (4541, 4693)]