21530415

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{3671}}^1$

素因数の和:3719

約数の個数: 32

約数和(自身を含む): 38071296

約数和(自身を除く): 16540881

約数列:

[1, 3, 5, 15, 17, 23, 51, 69, 85, 115, 255, 345, 391, 1173, 1955, 3671, 5865, 11013, 18355, 55065, 62407, 84433, 187221, 253299, 312035, 422165, 936105, 1266495, 1435361, 4306083, 7176805, 21530415]

約数ペア:

[(1, 21530415), (3, 7176805), (5, 4306083), (15, 1435361), (17, 1266495), (23, 936105), (51, 422165), (69, 312035), (85, 253299), (115, 187221), (255, 84433), (345, 62407), (391, 55065), (1173, 18355), (1955, 11013), (3671, 5865)]