1999595920

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{510101}}^1$

素因数の和:510128

約数の個数: 60

約数和(自身を含む): 5408101404

約数和(自身を除く): 3408505484

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, 510101, 1020202, 2040404, 2550505, 3570707, 4080808, 5101010, 7141414, 8161616, 10202020, 14282828, 17853535, 20404040, 24994949, 28565656, 35707070, 40808080, 49989898, 57131312, 71414140, 99979796, 124974745, 142828280, 199959592, 249949490, 285656560, 399919184, 499898980, 999797960, 1999595920]

約数ペア:

[(1, 1999595920), (2, 999797960), (4, 499898980), (5, 399919184), (7, 285656560), (8, 249949490), (10, 199959592), (14, 142828280), (16, 124974745), (20, 99979796), (28, 71414140), (35, 57131312), (40, 49989898), (49, 40808080), (56, 35707070), (70, 28565656), (80, 24994949), (98, 20404040), (112, 17853535), (140, 14282828), (196, 10202020), (245, 8161616), (280, 7141414), (392, 5101010), (490, 4080808), (560, 3570707), (784, 2550505), (980, 2040404), (1960, 1020202), (3920, 510101)]