21771981

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{353}}^1$

素因数の和:466

約数の個数: 48

約数和(自身を含む): 39761280

約数和(自身を除く): 17989299

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 89, 99, 231, 267, 353, 623, 693, 801, 979, 1059, 1869, 2471, 2937, 3177, 3883, 5607, 6853, 7413, 8811, 11649, 20559, 22239, 27181, 31417, 34947, 61677, 81543, 94251, 219919, 244629, 282753, 345587, 659757, 1036761, 1979271, 2419109, 3110283, 7257327, 21771981]

約数ペア:

[(1, 21771981), (3, 7257327), (7, 3110283), (9, 2419109), (11, 1979271), (21, 1036761), (33, 659757), (63, 345587), (77, 282753), (89, 244629), (99, 219919), (231, 94251), (267, 81543), (353, 61677), (623, 34947), (693, 31417), (801, 27181), (979, 22239), (1059, 20559), (1869, 11649), (2471, 8811), (2937, 7413), (3177, 6853), (3883, 5607)]