81018380

素因数分解:

$2^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{167}}^1\times {\mathrm{191}}^1$

素因数の和:494

約数の個数: 48

約数和(自身を含む): 173408256

約数和(自身を除く): 92389876

約数列:

[1, 2, 4, 5, 10, 20, 127, 167, 191, 254, 334, 382, 508, 635, 668, 764, 835, 955, 1270, 1670, 1910, 2540, 3340, 3820, 21209, 24257, 31897, 42418, 48514, 63794, 84836, 97028, 106045, 121285, 127588, 159485, 212090, 242570, 318970, 424180, 485140, 637940, 4050919, 8101838, 16203676, 20254595, 40509190, 81018380]

約数ペア:

[(1, 81018380), (2, 40509190), (4, 20254595), (5, 16203676), (10, 8101838), (20, 4050919), (127, 637940), (167, 485140), (191, 424180), (254, 318970), (334, 242570), (382, 212090), (508, 159485), (635, 127588), (668, 121285), (764, 106045), (835, 97028), (955, 84836), (1270, 63794), (1670, 48514), (1910, 42418), (2540, 31897), (3340, 24257), (3820, 21209)]