21124047

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{107}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 35458560

約数和(自身を除く): 14334513

約数列:

[1, 3, 7, 17, 21, 49, 51, 79, 107, 119, 147, 237, 321, 357, 553, 749, 833, 1343, 1659, 1819, 2247, 2499, 3871, 4029, 5243, 5457, 8453, 9401, 11613, 12733, 15729, 25359, 28203, 38199, 59171, 65807, 89131, 143701, 177513, 197421, 267393, 414197, 431103, 1005907, 1242591, 3017721, 7041349, 21124047]

約数ペア:

[(1, 21124047), (3, 7041349), (7, 3017721), (17, 1242591), (21, 1005907), (49, 431103), (51, 414197), (79, 267393), (107, 197421), (119, 177513), (147, 143701), (237, 89131), (321, 65807), (357, 59171), (553, 38199), (749, 28203), (833, 25359), (1343, 15729), (1659, 12733), (1819, 11613), (2247, 9401), (2499, 8453), (3871, 5457), (4029, 5243)]