20002004

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{5477}}^1$

素因数の和:5575

約数の個数: 24

約数和(自身を含む): 38652768

約数和(自身を除く): 18650764

約数列:

[1, 2, 4, 11, 22, 44, 83, 166, 332, 913, 1826, 3652, 5477, 10954, 21908, 60247, 120494, 240988, 454591, 909182, 1818364, 5000501, 10001002, 20002004]

約数ペア:

[(1, 20002004), (2, 10001002), (4, 5000501), (11, 1818364), (22, 909182), (44, 454591), (83, 240988), (166, 120494), (332, 60247), (913, 21908), (1826, 10954), (3652, 5477)]