19980560

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{10859}}^1$

素因数の和:10895

約数の個数: 40

約数和(自身を含む): 48479040

約数和(自身を除く): 28498480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 920, 1840, 10859, 21718, 43436, 54295, 86872, 108590, 173744, 217180, 249757, 434360, 499514, 868720, 999028, 1248785, 1998056, 2497570, 3996112, 4995140, 9990280, 19980560]

約数ペア:

[(1, 19980560), (2, 9990280), (4, 4995140), (5, 3996112), (8, 2497570), (10, 1998056), (16, 1248785), (20, 999028), (23, 868720), (40, 499514), (46, 434360), (80, 249757), (92, 217180), (115, 173744), (184, 108590), (230, 86872), (368, 54295), (460, 43436), (920, 21718), (1840, 10859)]