81299780

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{487}}^1\times {\mathrm{491}}^1$

素因数の和:1004

約数の個数: 48

約数和(自身を含む): 181512576

約数和(自身を除く): 100212796

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 487, 491, 974, 982, 1948, 1964, 2435, 2455, 4870, 4910, 8279, 8347, 9740, 9820, 16558, 16694, 33116, 33388, 41395, 41735, 82790, 83470, 165580, 166940, 239117, 478234, 956468, 1195585, 2391170, 4064989, 4782340, 8129978, 16259956, 20324945, 40649890, 81299780]

約数ペア:

[(1, 81299780), (2, 40649890), (4, 20324945), (5, 16259956), (10, 8129978), (17, 4782340), (20, 4064989), (34, 2391170), (68, 1195585), (85, 956468), (170, 478234), (340, 239117), (487, 166940), (491, 165580), (974, 83470), (982, 82790), (1948, 41735), (1964, 41395), (2435, 33388), (2455, 33116), (4870, 16694), (4910, 16558), (8279, 9820), (8347, 9740)]