20996720

素因数分解:

$2^4\times 5^1\times {\mathrm{262459}}^1$

素因数の和:262472

約数の個数: 20

約数和(自身を含む): 48817560

約数和(自身を除く): 27820840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 262459, 524918, 1049836, 1312295, 2099672, 2624590, 4199344, 5249180, 10498360, 20996720]

約数ペア:

[(1, 20996720), (2, 10498360), (4, 5249180), (5, 4199344), (8, 2624590), (10, 2099672), (16, 1312295), (20, 1049836), (40, 524918), (80, 262459)]