19717740

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{15649}}^1$

素因数の和:15671

約数の個数: 72

約数和(自身を含む): 68359200

約数和(自身を除く): 48641460

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 15649, 31298, 46947, 62596, 78245, 93894, 109543, 140841, 156490, 187788, 219086, 234735, 281682, 312980, 328629, 438172, 469470, 547715, 563364, 657258, 704205, 938940, 985887, 1095430, 1314516, 1408410, 1643145, 1971774, 2190860, 2816820, 3286290, 3943548, 4929435, 6572580, 9858870, 19717740]

約数ペア:

[(1, 19717740), (2, 9858870), (3, 6572580), (4, 4929435), (5, 3943548), (6, 3286290), (7, 2816820), (9, 2190860), (10, 1971774), (12, 1643145), (14, 1408410), (15, 1314516), (18, 1095430), (20, 985887), (21, 938940), (28, 704205), (30, 657258), (35, 563364), (36, 547715), (42, 469470), (45, 438172), (60, 328629), (63, 312980), (70, 281682), (84, 234735), (90, 219086), (105, 187788), (126, 156490), (140, 140841), (180, 109543), (210, 93894), (252, 78245), (315, 62596), (420, 46947), (630, 31298), (1260, 15649)]