21671985

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1\times {\mathrm{269}}^1$

素因数の和:449

約数の個数: 32

約数和(自身を含む): 35925120

約数和(自身を除く): 14253135

約数列:

[1, 3, 5, 15, 41, 123, 131, 205, 269, 393, 615, 655, 807, 1345, 1965, 4035, 5371, 11029, 16113, 26855, 33087, 35239, 55145, 80565, 105717, 165435, 176195, 528585, 1444799, 4334397, 7223995, 21671985]

約数ペア:

[(1, 21671985), (3, 7223995), (5, 4334397), (15, 1444799), (41, 528585), (123, 176195), (131, 165435), (205, 105717), (269, 80565), (393, 55145), (615, 35239), (655, 33087), (807, 26855), (1345, 16113), (1965, 11029), (4035, 5371)]