20307950

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{199}}^1$

素因数の和:381

約数の個数: 48

約数和(自身を含む): 41143200

約数和(自身を除く): 20835250

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 130, 157, 199, 314, 325, 398, 650, 785, 995, 1570, 1990, 2041, 2587, 3925, 4082, 4975, 5174, 7850, 9950, 10205, 12935, 20410, 25870, 31243, 51025, 62486, 64675, 102050, 129350, 156215, 312430, 406159, 781075, 812318, 1562150, 2030795, 4061590, 10153975, 20307950]

約数ペア:

[(1, 20307950), (2, 10153975), (5, 4061590), (10, 2030795), (13, 1562150), (25, 812318), (26, 781075), (50, 406159), (65, 312430), (130, 156215), (157, 129350), (199, 102050), (314, 64675), (325, 62486), (398, 51025), (650, 31243), (785, 25870), (995, 20410), (1570, 12935), (1990, 10205), (2041, 9950), (2587, 7850), (3925, 5174), (4082, 4975)]