71450980

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1\times {\mathrm{293}}^1$

素因数の和:528

約数の個数: 48

約数和(自身を含む): 153362160

約数和(自身を除く): 81911180

約数列:

[1, 2, 4, 5, 10, 20, 89, 137, 178, 274, 293, 356, 445, 548, 586, 685, 890, 1172, 1370, 1465, 1780, 2740, 2930, 5860, 12193, 24386, 26077, 40141, 48772, 52154, 60965, 80282, 104308, 121930, 130385, 160564, 200705, 243860, 260770, 401410, 521540, 802820, 3572549, 7145098, 14290196, 17862745, 35725490, 71450980]

約数ペア:

[(1, 71450980), (2, 35725490), (4, 17862745), (5, 14290196), (10, 7145098), (20, 3572549), (89, 802820), (137, 521540), (178, 401410), (274, 260770), (293, 243860), (356, 200705), (445, 160564), (548, 130385), (586, 121930), (685, 104308), (890, 80282), (1172, 60965), (1370, 52154), (1465, 48772), (1780, 40141), (2740, 26077), (2930, 24386), (5860, 12193)]