21181965

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{23}}^1\times {\mathrm{179}}^1$

素因数の和:231

約数の個数: 64

約数和(自身を含む): 41472000

約数和(自身を除く): 20290035

約数列:

[1, 3, 5, 7, 15, 21, 23, 35, 49, 69, 105, 115, 147, 161, 179, 245, 343, 345, 483, 537, 735, 805, 895, 1029, 1127, 1253, 1715, 2415, 2685, 3381, 3759, 4117, 5145, 5635, 6265, 7889, 8771, 12351, 16905, 18795, 20585, 23667, 26313, 28819, 39445, 43855, 61397, 61755, 86457, 118335, 131565, 144095, 184191, 201733, 306985, 432285, 605199, 920955, 1008665, 1412131, 3025995, 4236393, 7060655, 21181965]

約数ペア:

[(1, 21181965), (3, 7060655), (5, 4236393), (7, 3025995), (15, 1412131), (21, 1008665), (23, 920955), (35, 605199), (49, 432285), (69, 306985), (105, 201733), (115, 184191), (147, 144095), (161, 131565), (179, 118335), (245, 86457), (343, 61755), (345, 61397), (483, 43855), (537, 39445), (735, 28819), (805, 26313), (895, 23667), (1029, 20585), (1127, 18795), (1253, 16905), (1715, 12351), (2415, 8771), (2685, 7889), (3381, 6265), (3759, 5635), (4117, 5145)]