19110920

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{271}}^1$

素因数の和:366

約数の個数: 64

約数和(自身を含む): 45239040

約数和(自身を除く): 26128120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 43, 82, 86, 164, 172, 205, 215, 271, 328, 344, 410, 430, 542, 820, 860, 1084, 1355, 1640, 1720, 1763, 2168, 2710, 3526, 5420, 7052, 8815, 10840, 11111, 11653, 14104, 17630, 22222, 23306, 35260, 44444, 46612, 55555, 58265, 70520, 88888, 93224, 111110, 116530, 222220, 233060, 444440, 466120, 477773, 955546, 1911092, 2388865, 3822184, 4777730, 9555460, 19110920]

約数ペア:

[(1, 19110920), (2, 9555460), (4, 4777730), (5, 3822184), (8, 2388865), (10, 1911092), (20, 955546), (40, 477773), (41, 466120), (43, 444440), (82, 233060), (86, 222220), (164, 116530), (172, 111110), (205, 93224), (215, 88888), (271, 70520), (328, 58265), (344, 55555), (410, 46612), (430, 44444), (542, 35260), (820, 23306), (860, 22222), (1084, 17630), (1355, 14104), (1640, 11653), (1720, 11111), (1763, 10840), (2168, 8815), (2710, 7052), (3526, 5420)]