21131085

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{173}}^1\times {\mathrm{479}}^1$

素因数の和:677

約数の個数: 32

約数和(自身を含む): 36080640

約数和(自身を除く): 14949555

約数列:

[1, 3, 5, 15, 17, 51, 85, 173, 255, 479, 519, 865, 1437, 2395, 2595, 2941, 7185, 8143, 8823, 14705, 24429, 40715, 44115, 82867, 122145, 248601, 414335, 1243005, 1408739, 4226217, 7043695, 21131085]

約数ペア:

[(1, 21131085), (3, 7043695), (5, 4226217), (15, 1408739), (17, 1243005), (51, 414335), (85, 248601), (173, 122145), (255, 82867), (479, 44115), (519, 40715), (865, 24429), (1437, 14705), (2395, 8823), (2595, 8143), (2941, 7185)]