77980840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{278503}}^1$

素因数の和:278521

約数の個数: 32

約数和(自身を含む): 200522880

約数和(自身を除く): 122542040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 278503, 557006, 1114012, 1392515, 1949521, 2228024, 2785030, 3899042, 5570060, 7798084, 9747605, 11140120, 15596168, 19495210, 38990420, 77980840]

約数ペア:

[(1, 77980840), (2, 38990420), (4, 19495210), (5, 15596168), (7, 11140120), (8, 9747605), (10, 7798084), (14, 5570060), (20, 3899042), (28, 2785030), (35, 2228024), (40, 1949521), (56, 1392515), (70, 1114012), (140, 557006), (280, 278503)]