20902404920

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12152561}}^1$

素因数の和:12152615

約数の個数: 32

約数和(自身を含む): 48124145520

約数和(自身を除く): 27221740600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12152561, 24305122, 48610244, 60762805, 97220488, 121525610, 243051220, 486102440, 522560123, 1045120246, 2090240492, 2612800615, 4180480984, 5225601230, 10451202460, 20902404920]

約数ペア:

[(1, 20902404920), (2, 10451202460), (4, 5225601230), (5, 4180480984), (8, 2612800615), (10, 2090240492), (20, 1045120246), (40, 522560123), (43, 486102440), (86, 243051220), (172, 121525610), (215, 97220488), (344, 60762805), (430, 48610244), (860, 24305122), (1720, 12152561)]