168313780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{641}}^1\times {\mathrm{691}}^1$

素因数の和:1360

約数の個数: 48

約数和(自身を含む): 373181760

約数和(自身を除く): 204867980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 641, 691, 1282, 1382, 2564, 2764, 3205, 3455, 6410, 6910, 12179, 12820, 13129, 13820, 24358, 26258, 48716, 52516, 60895, 65645, 121790, 131290, 243580, 262580, 442931, 885862, 1771724, 2214655, 4429310, 8415689, 8858620, 16831378, 33662756, 42078445, 84156890, 168313780]

約数ペア:

[(1, 168313780), (2, 84156890), (4, 42078445), (5, 33662756), (10, 16831378), (19, 8858620), (20, 8415689), (38, 4429310), (76, 2214655), (95, 1771724), (190, 885862), (380, 442931), (641, 262580), (691, 243580), (1282, 131290), (1382, 121790), (2564, 65645), (2764, 60895), (3205, 52516), (3455, 48716), (6410, 26258), (6910, 24358), (12179, 13820), (12820, 13129)]