21288351

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{617}}^1$

素因数の和:711

約数の個数: 32

約数和(自身を含む): 34172928

約数和(自身を除く): 12884577

約数列:

[1, 3, 7, 21, 31, 53, 93, 159, 217, 371, 617, 651, 1113, 1643, 1851, 4319, 4929, 11501, 12957, 19127, 32701, 34503, 57381, 98103, 133889, 228907, 401667, 686721, 1013731, 3041193, 7096117, 21288351]

約数ペア:

[(1, 21288351), (3, 7096117), (7, 3041193), (21, 1013731), (31, 686721), (53, 401667), (93, 228907), (159, 133889), (217, 98103), (371, 57381), (617, 34503), (651, 32701), (1113, 19127), (1643, 12957), (1851, 11501), (4319, 4929)]