20799760

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8387}}^1$

素因数の和:8431

約数の個数: 40

約数和(自身を含む): 49925376

約数和(自身を除く): 29125616

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8387, 16774, 33548, 41935, 67096, 83870, 134192, 167740, 259997, 335480, 519994, 670960, 1039988, 1299985, 2079976, 2599970, 4159952, 5199940, 10399880, 20799760]

約数ペア:

[(1, 20799760), (2, 10399880), (4, 5199940), (5, 4159952), (8, 2599970), (10, 2079976), (16, 1299985), (20, 1039988), (31, 670960), (40, 519994), (62, 335480), (80, 259997), (124, 167740), (155, 134192), (248, 83870), (310, 67096), (496, 41935), (620, 33548), (1240, 16774), (2480, 8387)]