19877680

素因数分解:

$2^4\times 5^1\times {\mathrm{241}}^1\times {\mathrm{1031}}^1$

素因数の和:1285

約数の個数: 40

約数和(自身を含む): 46452384

約数和(自身を除く): 26574704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 241, 482, 964, 1031, 1205, 1928, 2062, 2410, 3856, 4124, 4820, 5155, 8248, 9640, 10310, 16496, 19280, 20620, 41240, 82480, 248471, 496942, 993884, 1242355, 1987768, 2484710, 3975536, 4969420, 9938840, 19877680]

約数ペア:

[(1, 19877680), (2, 9938840), (4, 4969420), (5, 3975536), (8, 2484710), (10, 1987768), (16, 1242355), (20, 993884), (40, 496942), (80, 248471), (241, 82480), (482, 41240), (964, 20620), (1031, 19280), (1205, 16496), (1928, 10310), (2062, 9640), (2410, 8248), (3856, 5155), (4124, 4820)]