121020920

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{991}}^1$

素因数の和:1116

約数の個数: 64

約数和(自身を含む): 282839040

約数和(自身を除く): 161818120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 71, 86, 142, 172, 215, 284, 344, 355, 430, 568, 710, 860, 991, 1420, 1720, 1982, 2840, 3053, 3964, 4955, 6106, 7928, 9910, 12212, 15265, 19820, 24424, 30530, 39640, 42613, 61060, 70361, 85226, 122120, 140722, 170452, 213065, 281444, 340904, 351805, 426130, 562888, 703610, 852260, 1407220, 1704520, 2814440, 3025523, 6051046, 12102092, 15127615, 24204184, 30255230, 60510460, 121020920]

約数ペア:

[(1, 121020920), (2, 60510460), (4, 30255230), (5, 24204184), (8, 15127615), (10, 12102092), (20, 6051046), (40, 3025523), (43, 2814440), (71, 1704520), (86, 1407220), (142, 852260), (172, 703610), (215, 562888), (284, 426130), (344, 351805), (355, 340904), (430, 281444), (568, 213065), (710, 170452), (860, 140722), (991, 122120), (1420, 85226), (1720, 70361), (1982, 61060), (2840, 42613), (3053, 39640), (3964, 30530), (4955, 24424), (6106, 19820), (7928, 15265), (9910, 12212)]