261640420

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{146989}}^1$

素因数の和:147087

約数の個数: 24

約数和(自身を含む): 555622200

約数和(自身を除く): 293981780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 146989, 293978, 587956, 734945, 1469890, 2939780, 13082021, 26164042, 52328084, 65410105, 130820210, 261640420]

約数ペア:

[(1, 261640420), (2, 130820210), (4, 65410105), (5, 52328084), (10, 26164042), (20, 13082021), (89, 2939780), (178, 1469890), (356, 734945), (445, 587956), (890, 293978), (1780, 146989)]