21660465

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{173}}^1\times {\mathrm{491}}^1$

素因数の和:689

約数の個数: 32

約数和(自身を含む): 36982656

約数和(自身を除く): 15322191

約数列:

[1, 3, 5, 15, 17, 51, 85, 173, 255, 491, 519, 865, 1473, 2455, 2595, 2941, 7365, 8347, 8823, 14705, 25041, 41735, 44115, 84943, 125205, 254829, 424715, 1274145, 1444031, 4332093, 7220155, 21660465]

約数ペア:

[(1, 21660465), (3, 7220155), (5, 4332093), (15, 1444031), (17, 1274145), (51, 424715), (85, 254829), (173, 125205), (255, 84943), (491, 44115), (519, 41735), (865, 25041), (1473, 14705), (2455, 8823), (2595, 8347), (2941, 7365)]