19702900

素因数分解:

$2^2\times 5^2\times 7^2\times {\mathrm{4021}}^1$

素因数の和:4049

約数の個数: 54

約数和(自身を含む): 49748118

約数和(自身を除く): 30045218

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 49, 50, 70, 98, 100, 140, 175, 196, 245, 350, 490, 700, 980, 1225, 2450, 4021, 4900, 8042, 16084, 20105, 28147, 40210, 56294, 80420, 100525, 112588, 140735, 197029, 201050, 281470, 394058, 402100, 562940, 703675, 788116, 985145, 1407350, 1970290, 2814700, 3940580, 4925725, 9851450, 19702900]

約数ペア:

[(1, 19702900), (2, 9851450), (4, 4925725), (5, 3940580), (7, 2814700), (10, 1970290), (14, 1407350), (20, 985145), (25, 788116), (28, 703675), (35, 562940), (49, 402100), (50, 394058), (70, 281470), (98, 201050), (100, 197029), (140, 140735), (175, 112588), (196, 100525), (245, 80420), (350, 56294), (490, 40210), (700, 28147), (980, 20105), (1225, 16084), (2450, 8042), (4021, 4900)]