82080880

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{20939}}^1$

素因数の和:20966

約数の個数: 60

約数和(自身を含む): 222005880

約数和(自身を除く): 139925000

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, 20939, 41878, 83756, 104695, 146573, 167512, 209390, 293146, 335024, 418780, 586292, 732865, 837560, 1026011, 1172584, 1465730, 1675120, 2052022, 2345168, 2931460, 4104044, 5130055, 5862920, 8208088, 10260110, 11725840, 16416176, 20520220, 41040440, 82080880]

約数ペア:

[(1, 82080880), (2, 41040440), (4, 20520220), (5, 16416176), (7, 11725840), (8, 10260110), (10, 8208088), (14, 5862920), (16, 5130055), (20, 4104044), (28, 2931460), (35, 2345168), (40, 2052022), (49, 1675120), (56, 1465730), (70, 1172584), (80, 1026011), (98, 837560), (112, 732865), (140, 586292), (196, 418780), (245, 335024), (280, 293146), (392, 209390), (490, 167512), (560, 146573), (784, 104695), (980, 83756), (1960, 41878), (3920, 20939)]