31018280

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{8713}}^1$

素因数の和:8813

約数の個数: 32

約数和(自身を含む): 70583400

約数和(自身を除く): 39565120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 8713, 17426, 34852, 43565, 69704, 87130, 174260, 348520, 775457, 1550914, 3101828, 3877285, 6203656, 7754570, 15509140, 31018280]

約数ペア:

[(1, 31018280), (2, 15509140), (4, 7754570), (5, 6203656), (8, 3877285), (10, 3101828), (20, 1550914), (40, 775457), (89, 348520), (178, 174260), (356, 87130), (445, 69704), (712, 43565), (890, 34852), (1780, 17426), (3560, 8713)]