20912120

素因数分解:

$2^3\times 5^1\times {\mathrm{431}}^1\times {\mathrm{1213}}^1$

素因数の和:1655

約数の個数: 32

約数和(自身を含む): 47200320

約数和(自身を除く): 26288200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 431, 862, 1213, 1724, 2155, 2426, 3448, 4310, 4852, 6065, 8620, 9704, 12130, 17240, 24260, 48520, 522803, 1045606, 2091212, 2614015, 4182424, 5228030, 10456060, 20912120]

約数ペア:

[(1, 20912120), (2, 10456060), (4, 5228030), (5, 4182424), (8, 2614015), (10, 2091212), (20, 1045606), (40, 522803), (431, 48520), (862, 24260), (1213, 17240), (1724, 12130), (2155, 9704), (2426, 8620), (3448, 6065), (4310, 4852)]