128518180

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{199}}^1\times {\mathrm{659}}^1$

素因数の和:881

約数の個数: 72

約数和(自身を含む): 316008000

約数和(自身を除く): 187489820

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 199, 245, 398, 490, 659, 796, 980, 995, 1318, 1393, 1990, 2636, 2786, 3295, 3980, 4613, 5572, 6590, 6965, 9226, 9751, 13180, 13930, 18452, 19502, 23065, 27860, 32291, 39004, 46130, 48755, 64582, 92260, 97510, 129164, 131141, 161455, 195020, 262282, 322910, 524564, 645820, 655705, 917987, 1311410, 1835974, 2622820, 3671948, 4589935, 6425909, 9179870, 12851818, 18359740, 25703636, 32129545, 64259090, 128518180]

約数ペア:

[(1, 128518180), (2, 64259090), (4, 32129545), (5, 25703636), (7, 18359740), (10, 12851818), (14, 9179870), (20, 6425909), (28, 4589935), (35, 3671948), (49, 2622820), (70, 1835974), (98, 1311410), (140, 917987), (196, 655705), (199, 645820), (245, 524564), (398, 322910), (490, 262282), (659, 195020), (796, 161455), (980, 131141), (995, 129164), (1318, 97510), (1393, 92260), (1990, 64582), (2636, 48755), (2786, 46130), (3295, 39004), (3980, 32291), (4613, 27860), (5572, 23065), (6590, 19502), (6965, 18452), (9226, 13930), (9751, 13180)]