76520420

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{42989}}^1$

素因数の和:43087

約数の個数: 24

約数和(自身を含む): 162502200

約数和(自身を除く): 85981780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 42989, 85978, 171956, 214945, 429890, 859780, 3826021, 7652042, 15304084, 19130105, 38260210, 76520420]

約数ペア:

[(1, 76520420), (2, 38260210), (4, 19130105), (5, 15304084), (10, 7652042), (20, 3826021), (89, 859780), (178, 429890), (356, 214945), (445, 171956), (890, 85978), (1780, 42989)]