20987940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{499}}^1\times {\mathrm{701}}^1$

素因数の和:1212

約数の個数: 48

約数和(自身を含む): 58968000

約数和(自身を除く): 37980060

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 499, 701, 998, 1402, 1497, 1996, 2103, 2495, 2804, 2994, 3505, 4206, 4990, 5988, 7010, 7485, 8412, 9980, 10515, 14020, 14970, 21030, 29940, 42060, 349799, 699598, 1049397, 1399196, 1748995, 2098794, 3497990, 4197588, 5246985, 6995980, 10493970, 20987940]

約数ペア:

[(1, 20987940), (2, 10493970), (3, 6995980), (4, 5246985), (5, 4197588), (6, 3497990), (10, 2098794), (12, 1748995), (15, 1399196), (20, 1049397), (30, 699598), (60, 349799), (499, 42060), (701, 29940), (998, 21030), (1402, 14970), (1497, 14020), (1996, 10515), (2103, 9980), (2495, 8412), (2804, 7485), (2994, 7010), (3505, 5988), (4206, 4990)]