78728240

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{12457}}^1$

素因数の和:12549

約数の個数: 40

約数和(自身を含む): 185375040

約数和(自身を除く): 106646800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 6320, 12457, 24914, 49828, 62285, 99656, 124570, 199312, 249140, 498280, 984103, 996560, 1968206, 3936412, 4920515, 7872824, 9841030, 15745648, 19682060, 39364120, 78728240]

約数ペア:

[(1, 78728240), (2, 39364120), (4, 19682060), (5, 15745648), (8, 9841030), (10, 7872824), (16, 4920515), (20, 3936412), (40, 1968206), (79, 996560), (80, 984103), (158, 498280), (316, 249140), (395, 199312), (632, 124570), (790, 99656), (1264, 62285), (1580, 49828), (3160, 24914), (6320, 12457)]