20999580

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{49999}}^1$

素因数の和:50018

約数の個数: 48

約数和(自身を含む): 67200000

約数和(自身を除く): 46200420

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 49999, 99998, 149997, 199996, 249995, 299994, 349993, 499990, 599988, 699986, 749985, 999980, 1049979, 1399972, 1499970, 1749965, 2099958, 2999940, 3499930, 4199916, 5249895, 6999860, 10499790, 20999580]

約数ペア:

[(1, 20999580), (2, 10499790), (3, 6999860), (4, 5249895), (5, 4199916), (6, 3499930), (7, 2999940), (10, 2099958), (12, 1749965), (14, 1499970), (15, 1399972), (20, 1049979), (21, 999980), (28, 749985), (30, 699986), (35, 599988), (42, 499990), (60, 349993), (70, 299994), (84, 249995), (105, 199996), (140, 149997), (210, 99998), (420, 49999)]