21395745

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{7547}}^1$

素因数の和:7571

約数の個数: 40

約数和(自身を含む): 43838784

約数和(自身を除く): 22443039

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 315, 405, 567, 945, 2835, 7547, 22641, 37735, 52829, 67923, 113205, 158487, 203769, 264145, 339615, 475461, 611307, 792435, 1018845, 1426383, 2377305, 3056535, 4279149, 7131915, 21395745]

約数ペア:

[(1, 21395745), (3, 7131915), (5, 4279149), (7, 3056535), (9, 2377305), (15, 1426383), (21, 1018845), (27, 792435), (35, 611307), (45, 475461), (63, 339615), (81, 264145), (105, 203769), (135, 158487), (189, 113205), (315, 67923), (405, 52829), (567, 37735), (945, 22641), (2835, 7547)]