21539385

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{991}}^1$

素因数の和:1035

約数の個数: 64

約数和(自身を含む): 45711360

約数和(自身を除く): 24171975

約数列:

[1, 3, 5, 7, 9, 15, 21, 23, 27, 35, 45, 63, 69, 105, 115, 135, 161, 189, 207, 315, 345, 483, 621, 805, 945, 991, 1035, 1449, 2415, 2973, 3105, 4347, 4955, 6937, 7245, 8919, 14865, 20811, 21735, 22793, 26757, 34685, 44595, 62433, 68379, 104055, 113965, 133785, 159551, 187299, 205137, 312165, 341895, 478653, 615411, 797755, 936495, 1025685, 1435959, 2393265, 3077055, 4307877, 7179795, 21539385]

約数ペア:

[(1, 21539385), (3, 7179795), (5, 4307877), (7, 3077055), (9, 2393265), (15, 1435959), (21, 1025685), (23, 936495), (27, 797755), (35, 615411), (45, 478653), (63, 341895), (69, 312165), (105, 205137), (115, 187299), (135, 159551), (161, 133785), (189, 113965), (207, 104055), (315, 68379), (345, 62433), (483, 44595), (621, 34685), (805, 26757), (945, 22793), (991, 21735), (1035, 20811), (1449, 14865), (2415, 8919), (2973, 7245), (3105, 6937), (4347, 4955)]