320220880

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{81689}}^1$

素因数の和:81716

約数の個数: 60

約数和(自身を含む): 866077380

約数和(自身を除く): 545856500

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 81689, 163378, 326756, 408445, 571823, 653512, 816890, 1143646, 1307024, 1633780, 2287292, 2859115, 3267560, 4002761, 4574584, 5718230, 6535120, 8005522, 9149168, 11436460, 16011044, 20013805, 22872920, 32022088, 40027610, 45745840, 64044176, 80055220, 160110440, 320220880]

約数ペア:

[(1, 320220880), (2, 160110440), (4, 80055220), (5, 64044176), (7, 45745840), (8, 40027610), (10, 32022088), (14, 22872920), (16, 20013805), (20, 16011044), (28, 11436460), (35, 9149168), (40, 8005522), (49, 6535120), (56, 5718230), (70, 4574584), (80, 4002761), (98, 3267560), (112, 2859115), (140, 2287292), (196, 1633780), (245, 1307024), (280, 1143646), (392, 816890), (490, 653512), (560, 571823), (784, 408445), (980, 326756), (1960, 163378), (3920, 81689)]