81456040

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^2\times {\mathrm{5641}}^1$

素因数の和:5690

約数の個数: 48

約数和(自身を含む): 193464180

約数和(自身を除く): 112008140

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 361, 380, 722, 760, 1444, 1805, 2888, 3610, 5641, 7220, 11282, 14440, 22564, 28205, 45128, 56410, 107179, 112820, 214358, 225640, 428716, 535895, 857432, 1071790, 2036401, 2143580, 4072802, 4287160, 8145604, 10182005, 16291208, 20364010, 40728020, 81456040]

約数ペア:

[(1, 81456040), (2, 40728020), (4, 20364010), (5, 16291208), (8, 10182005), (10, 8145604), (19, 4287160), (20, 4072802), (38, 2143580), (40, 2036401), (76, 1071790), (95, 857432), (152, 535895), (190, 428716), (361, 225640), (380, 214358), (722, 112820), (760, 107179), (1444, 56410), (1805, 45128), (2888, 28205), (3610, 22564), (5641, 14440), (7220, 11282)]