18115965

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{199}}^1$

素因数の和:251

約数の個数: 72

約数和(自身を含む): 38313600

約数和(自身を除く): 20197635

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 63, 85, 105, 119, 153, 199, 255, 289, 315, 357, 595, 597, 765, 867, 995, 1071, 1393, 1445, 1785, 1791, 2023, 2601, 2985, 3383, 4179, 4335, 5355, 6069, 6965, 8955, 10115, 10149, 12537, 13005, 16915, 18207, 20895, 23681, 30345, 30447, 50745, 57511, 62685, 71043, 91035, 118405, 152235, 172533, 213129, 287555, 355215, 402577, 517599, 862665, 1065645, 1207731, 2012885, 2587995, 3623193, 6038655, 18115965]

約数ペア:

[(1, 18115965), (3, 6038655), (5, 3623193), (7, 2587995), (9, 2012885), (15, 1207731), (17, 1065645), (21, 862665), (35, 517599), (45, 402577), (51, 355215), (63, 287555), (85, 213129), (105, 172533), (119, 152235), (153, 118405), (199, 91035), (255, 71043), (289, 62685), (315, 57511), (357, 50745), (595, 30447), (597, 30345), (765, 23681), (867, 20895), (995, 18207), (1071, 16915), (1393, 13005), (1445, 12537), (1785, 10149), (1791, 10115), (2023, 8955), (2601, 6965), (2985, 6069), (3383, 5355), (4179, 4335)]