21155385

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^2\times {\mathrm{839}}^1$

素因数の和:929

約数の個数: 24

約数和(自身を含む): 34735680

約数和(自身を除く): 13580295

約数列:

[1, 3, 5, 15, 41, 123, 205, 615, 839, 1681, 2517, 4195, 5043, 8405, 12585, 25215, 34399, 103197, 171995, 515985, 1410359, 4231077, 7051795, 21155385]

約数ペア:

[(1, 21155385), (3, 7051795), (5, 4231077), (15, 1410359), (41, 515985), (123, 171995), (205, 103197), (615, 34399), (839, 25215), (1681, 12585), (2517, 8405), (4195, 5043)]