81649640

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{167}}^1\times {\mathrm{719}}^1$

素因数の和:914

約数の個数: 64

約数和(自身を含む): 195955200

約数和(自身を除く): 114305560

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 167, 170, 334, 340, 668, 680, 719, 835, 1336, 1438, 1670, 2839, 2876, 3340, 3595, 5678, 5752, 6680, 7190, 11356, 12223, 14195, 14380, 22712, 24446, 28390, 28760, 48892, 56780, 61115, 97784, 113560, 120073, 122230, 240146, 244460, 480292, 488920, 600365, 960584, 1200730, 2041241, 2401460, 4082482, 4802920, 8164964, 10206205, 16329928, 20412410, 40824820, 81649640]

約数ペア:

[(1, 81649640), (2, 40824820), (4, 20412410), (5, 16329928), (8, 10206205), (10, 8164964), (17, 4802920), (20, 4082482), (34, 2401460), (40, 2041241), (68, 1200730), (85, 960584), (136, 600365), (167, 488920), (170, 480292), (334, 244460), (340, 240146), (668, 122230), (680, 120073), (719, 113560), (835, 97784), (1336, 61115), (1438, 56780), (1670, 48892), (2839, 28760), (2876, 28390), (3340, 24446), (3595, 22712), (5678, 14380), (5752, 14195), (6680, 12223), (7190, 11356)]