21248283

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{1123}}^1$

素因数の和:1203

約数の個数: 32

約数和(自身を含む): 34960896

約数和(自身を除く): 13712613

約数列:

[1, 3, 7, 17, 21, 51, 53, 119, 159, 357, 371, 901, 1113, 1123, 2703, 3369, 6307, 7861, 18921, 19091, 23583, 57273, 59519, 133637, 178557, 400911, 416633, 1011823, 1249899, 3035469, 7082761, 21248283]

約数ペア:

[(1, 21248283), (3, 7082761), (7, 3035469), (17, 1249899), (21, 1011823), (51, 416633), (53, 400911), (119, 178557), (159, 133637), (357, 59519), (371, 57273), (901, 23583), (1113, 19091), (1123, 18921), (2703, 7861), (3369, 6307)]