8471720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:258

約数の個数: 64

約数和(自身を含む): 20476800

約数和(自身を除く): 12005080

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 71, 76, 95, 142, 152, 157, 190, 284, 314, 355, 380, 568, 628, 710, 760, 785, 1256, 1349, 1420, 1570, 2698, 2840, 2983, 3140, 5396, 5966, 6280, 6745, 10792, 11147, 11932, 13490, 14915, 22294, 23864, 26980, 29830, 44588, 53960, 55735, 59660, 89176, 111470, 119320, 211793, 222940, 423586, 445880, 847172, 1058965, 1694344, 2117930, 4235860, 8471720]

約数ペア:

[(1, 8471720), (2, 4235860), (4, 2117930), (5, 1694344), (8, 1058965), (10, 847172), (19, 445880), (20, 423586), (38, 222940), (40, 211793), (71, 119320), (76, 111470), (95, 89176), (142, 59660), (152, 55735), (157, 53960), (190, 44588), (284, 29830), (314, 26980), (355, 23864), (380, 22294), (568, 14915), (628, 13490), (710, 11932), (760, 11147), (785, 10792), (1256, 6745), (1349, 6280), (1420, 5966), (1570, 5396), (2698, 3140), (2840, 2983)]