128870840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{20011}}^1$

素因数の和:20052

約数の個数: 64

約数和(自身を含む): 345807360

約数和(自身を除く): 216936520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 56, 70, 92, 115, 140, 161, 184, 230, 280, 322, 460, 644, 805, 920, 1288, 1610, 3220, 6440, 20011, 40022, 80044, 100055, 140077, 160088, 200110, 280154, 400220, 460253, 560308, 700385, 800440, 920506, 1120616, 1400770, 1841012, 2301265, 2801540, 3221771, 3682024, 4602530, 5603080, 6443542, 9205060, 12887084, 16108855, 18410120, 25774168, 32217710, 64435420, 128870840]

約数ペア:

[(1, 128870840), (2, 64435420), (4, 32217710), (5, 25774168), (7, 18410120), (8, 16108855), (10, 12887084), (14, 9205060), (20, 6443542), (23, 5603080), (28, 4602530), (35, 3682024), (40, 3221771), (46, 2801540), (56, 2301265), (70, 1841012), (92, 1400770), (115, 1120616), (140, 920506), (161, 800440), (184, 700385), (230, 560308), (280, 460253), (322, 400220), (460, 280154), (644, 200110), (805, 160088), (920, 140077), (1288, 100055), (1610, 80044), (3220, 40022), (6440, 20011)]