19999880

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{21739}}^1$

素因数の和:21773

約数の個数: 32

約数和(自身を含む): 46958400

約数和(自身を除く): 26958520

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 184, 230, 460, 920, 21739, 43478, 86956, 108695, 173912, 217390, 434780, 499997, 869560, 999994, 1999988, 2499985, 3999976, 4999970, 9999940, 19999880]

約数ペア:

[(1, 19999880), (2, 9999940), (4, 4999970), (5, 3999976), (8, 2499985), (10, 1999988), (20, 999994), (23, 869560), (40, 499997), (46, 434780), (92, 217390), (115, 173912), (184, 108695), (230, 86956), (460, 43478), (920, 21739)]