20496490540

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{393709}}^1$

素因数の和:393874

約数の個数: 48

約数和(自身を含む): 45638863200

約数和(自身を除く): 25142372660

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 137, 190, 274, 380, 548, 685, 1370, 2603, 2740, 5206, 10412, 13015, 26030, 52060, 393709, 787418, 1574836, 1968545, 3937090, 7480471, 7874180, 14960942, 29921884, 37402355, 53938133, 74804710, 107876266, 149609420, 215752532, 269690665, 539381330, 1024824527, 1078762660, 2049649054, 4099298108, 5124122635, 10248245270, 20496490540]

約数ペア:

[(1, 20496490540), (2, 10248245270), (4, 5124122635), (5, 4099298108), (10, 2049649054), (19, 1078762660), (20, 1024824527), (38, 539381330), (76, 269690665), (95, 215752532), (137, 149609420), (190, 107876266), (274, 74804710), (380, 53938133), (548, 37402355), (685, 29921884), (1370, 14960942), (2603, 7874180), (2740, 7480471), (5206, 3937090), (10412, 1968545), (13015, 1574836), (26030, 787418), (52060, 393709)]