21287030

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{563}}^1$

素因数の和:788

約数の個数: 32

約数和(自身を含む): 40608000

約数和(自身を除く): 19320970

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 199, 398, 563, 995, 1126, 1990, 2815, 3781, 5630, 7562, 10697, 18905, 21394, 37810, 53485, 106970, 112037, 224074, 560185, 1120370, 2128703, 4257406, 10643515, 21287030]

約数ペア:

[(1, 21287030), (2, 10643515), (5, 4257406), (10, 2128703), (19, 1120370), (38, 560185), (95, 224074), (190, 112037), (199, 106970), (398, 53485), (563, 37810), (995, 21394), (1126, 18905), (1990, 10697), (2815, 7562), (3781, 5630)]