20953040

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{6091}}^1$

素因数の和:6147

約数の個数: 40

約数和(自身を含む): 49856928

約数和(自身を除く): 28903888

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 6091, 12182, 24364, 30455, 48728, 60910, 97456, 121820, 243640, 261913, 487280, 523826, 1047652, 1309565, 2095304, 2619130, 4190608, 5238260, 10476520, 20953040]

約数ペア:

[(1, 20953040), (2, 10476520), (4, 5238260), (5, 4190608), (8, 2619130), (10, 2095304), (16, 1309565), (20, 1047652), (40, 523826), (43, 487280), (80, 261913), (86, 243640), (172, 121820), (215, 97456), (344, 60910), (430, 48728), (688, 30455), (860, 24364), (1720, 12182), (3440, 6091)]