20984994

素因数分解:

$2^1\times 3^6\times {\mathrm{37}}^1\times {\mathrm{389}}^1$

素因数の和:446

約数の個数: 56

約数和(自身を含む): 48594780

約数和(自身を除く): 27609786

約数列:

[1, 2, 3, 6, 9, 18, 27, 37, 54, 74, 81, 111, 162, 222, 243, 333, 389, 486, 666, 729, 778, 999, 1167, 1458, 1998, 2334, 2997, 3501, 5994, 7002, 8991, 10503, 14393, 17982, 21006, 26973, 28786, 31509, 43179, 53946, 63018, 86358, 94527, 129537, 189054, 259074, 283581, 388611, 567162, 777222, 1165833, 2331666, 3497499, 6994998, 10492497, 20984994]

約数ペア:

[(1, 20984994), (2, 10492497), (3, 6994998), (6, 3497499), (9, 2331666), (18, 1165833), (27, 777222), (37, 567162), (54, 388611), (74, 283581), (81, 259074), (111, 189054), (162, 129537), (222, 94527), (243, 86358), (333, 63018), (389, 53946), (486, 43179), (666, 31509), (729, 28786), (778, 26973), (999, 21006), (1167, 17982), (1458, 14393), (1998, 10503), (2334, 8991), (2997, 7002), (3501, 5994)]