20800156

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{269}}^1\times {\mathrm{1487}}^1$

素因数の和:1773

約数の個数: 24

約数和(自身を含む): 39372480

約数和(自身を除く): 18572324

約数列:

[1, 2, 4, 13, 26, 52, 269, 538, 1076, 1487, 2974, 3497, 5948, 6994, 13988, 19331, 38662, 77324, 400003, 800006, 1600012, 5200039, 10400078, 20800156]

約数ペア:

[(1, 20800156), (2, 10400078), (4, 5200039), (13, 1600012), (26, 800006), (52, 400003), (269, 77324), (538, 38662), (1076, 19331), (1487, 13988), (2974, 6994), (3497, 5948)]