21509020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{82727}}^1$

素因数の和:82749

約数の個数: 24

約数和(自身を含む): 48644064

約数和(自身を除く): 27135044

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 82727, 165454, 330908, 413635, 827270, 1075451, 1654540, 2150902, 4301804, 5377255, 10754510, 21509020]

約数ペア:

[(1, 21509020), (2, 10754510), (4, 5377255), (5, 4301804), (10, 2150902), (13, 1654540), (20, 1075451), (26, 827270), (52, 413635), (65, 330908), (130, 165454), (260, 82727)]