19401520

素因数分解:

$2^4\times 5^1\times {\mathrm{242519}}^1$

素因数の和:242532

約数の個数: 20

約数和(自身を含む): 45108720

約数和(自身を除く): 25707200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 242519, 485038, 970076, 1212595, 1940152, 2425190, 3880304, 4850380, 9700760, 19401520]

約数ペア:

[(1, 19401520), (2, 9700760), (4, 4850380), (5, 3880304), (8, 2425190), (10, 1940152), (16, 1212595), (20, 970076), (40, 485038), (80, 242519)]