20925680

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2939}}^1$

素因数の和:3041

約数の個数: 40

約数和(自身を含む): 49215600

約数和(自身を除く): 28289920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2939, 3560, 5878, 7120, 11756, 14695, 23512, 29390, 47024, 58780, 117560, 235120, 261571, 523142, 1046284, 1307855, 2092568, 2615710, 4185136, 5231420, 10462840, 20925680]

約数ペア:

[(1, 20925680), (2, 10462840), (4, 5231420), (5, 4185136), (8, 2615710), (10, 2092568), (16, 1307855), (20, 1046284), (40, 523142), (80, 261571), (89, 235120), (178, 117560), (356, 58780), (445, 47024), (712, 29390), (890, 23512), (1424, 14695), (1780, 11756), (2939, 7120), (3560, 5878)]