19721661211

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{35449}}^1$

素因数の和:35611

約数の個数: 32

約数和(自身を含む): 24503040000

約数和(自身を除く): 4781378789

約数列:

[1, 7, 19, 47, 89, 133, 329, 623, 893, 1691, 4183, 6251, 11837, 29281, 35449, 79477, 248143, 556339, 673531, 1666103, 3154961, 4714717, 11662721, 22084727, 31655957, 59944259, 148283167, 221591699, 419609813, 1037982169, 2817380173, 19721661211]

約数ペア:

[(1, 19721661211), (7, 2817380173), (19, 1037982169), (47, 419609813), (89, 221591699), (133, 148283167), (329, 59944259), (623, 31655957), (893, 22084727), (1691, 11662721), (4183, 4714717), (6251, 3154961), (11837, 1666103), (29281, 673531), (35449, 556339), (79477, 248143)]