81967540

素因数分解:

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

素因数の和:1008

約数の個数: 36

約数和(自身を含む): 182629188

約数和(自身を除く): 100661648

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 491, 982, 1964, 2455, 4910, 8347, 9820, 16694, 33388, 41735, 83470, 166940, 241081, 482162, 964324, 1205405, 2410810, 4098377, 4821620, 8196754, 16393508, 20491885, 40983770, 81967540]

約数ペア:

[(1, 81967540), (2, 40983770), (4, 20491885), (5, 16393508), (10, 8196754), (17, 4821620), (20, 4098377), (34, 2410810), (68, 1205405), (85, 964324), (170, 482162), (340, 241081), (491, 166940), (982, 83470), (1964, 41735), (2455, 33388), (4910, 16694), (8347, 9820)]