19740440

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{499}}^1$

素因数の和:576

約数の個数: 64

約数和(自身を含む): 47520000

約数和(自身を除く): 27779560

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 43, 46, 86, 92, 115, 172, 184, 215, 230, 344, 430, 460, 499, 860, 920, 989, 998, 1720, 1978, 1996, 2495, 3956, 3992, 4945, 4990, 7912, 9890, 9980, 11477, 19780, 19960, 21457, 22954, 39560, 42914, 45908, 57385, 85828, 91816, 107285, 114770, 171656, 214570, 229540, 429140, 459080, 493511, 858280, 987022, 1974044, 2467555, 3948088, 4935110, 9870220, 19740440]

約数ペア:

[(1, 19740440), (2, 9870220), (4, 4935110), (5, 3948088), (8, 2467555), (10, 1974044), (20, 987022), (23, 858280), (40, 493511), (43, 459080), (46, 429140), (86, 229540), (92, 214570), (115, 171656), (172, 114770), (184, 107285), (215, 91816), (230, 85828), (344, 57385), (430, 45908), (460, 42914), (499, 39560), (860, 22954), (920, 21457), (989, 19960), (998, 19780), (1720, 11477), (1978, 9980), (1996, 9890), (2495, 7912), (3956, 4990), (3992, 4945)]